Executive Summary:
A high-severity vulnerability has been identified in multiple Totolink networking products, including the A3600R model. This flaw can be exploited by an attacker to gain control over the affected device, potentially leading to a full network compromise, data theft, or service disruption. Organizations using the affected Totolink products are at significant risk and should take immediate action.

Vulnerability Details

CVE-ID: CVE-2026-1686

Affected Software: Totolink Multiple Products

Affected Versions: A3600R version 5 and potentially other products. See vendor advisory for a complete list of affected versions.

Vulnerability: Based on the high CVSS score, this vulnerability is likely a critical flaw such as an unauthenticated remote code execution (RCE) or command injection vulnerability in the device's web management interface. An attacker on the network could likely send a specially crafted HTTP request to a vulnerable endpoint on the device. This could allow the attacker to execute arbitrary operating system commands with root-level privileges, granting them complete control over the device's functions and access to the network it manages.

Business Impact

This vulnerability is rated as High severity with a CVSS score of 8.8. Successful exploitation could result in a complete compromise of the network infrastructure managed by the Totolink device. This would provide an attacker with a strategic foothold inside the network, from which they could intercept sensitive data, pivot to attack other internal systems, disrupt internet connectivity, or install persistent malware. The specific risks to the organization include data breaches, significant business interruption, reputational damage, and the potential for financial loss.

Remediation Plan

Immediate Action: Immediately apply the security updates provided by Totolink to all affected devices as the primary mitigation strategy. After patching, it is crucial to review system and access logs for any anomalous activity or indicators of compromise that may have occurred before the patch was applied.

Proactive Monitoring: Implement enhanced monitoring of network traffic originating from the affected devices. Look for unusual outbound connections, unexpected DNS queries, or communication with known malicious IP addresses. Security teams should review web access logs on the devices for malformed requests or repeated attempts to access system-level files or functions.

Compensating Controls: If patching cannot be performed immediately, implement the following controls to reduce risk:

• Restrict access to the device's web management interface to a dedicated, trusted administrative network or specific IP addresses.
• Ensure the management interface is not exposed to the public internet.
• Implement network segmentation to limit the lateral movement of an attacker should the device become compromised.
• Use an Intrusion Prevention System (IPS) with rules capable of detecting and blocking exploit attempts targeting this vulnerability.

Exploitation Status

Public Exploit Available: False

Analyst Notes: As of February 1, 2026, there are no known public exploits or active, widespread exploitation campaigns targeting this vulnerability. However, given the high severity score (CVSS 8.8) and the commonality of networking devices as targets, it is highly probable that both security researchers and threat actors will develop exploit code in the near future.

Analyst Recommendation

Given the high severity of this vulnerability, we strongly recommend that all affected Totolink devices be patched immediately. The potential for complete network compromise presents an unacceptable risk. Although CVE-2026-1686 is not currently listed on the CISA KEV catalog, vulnerabilities of this nature in perimeter network devices are prime candidates for future inclusion and are frequently targeted by threat actors. Organizations must prioritize the deployment of the vendor-supplied patch within their critical vulnerability remediation timelines.

Description Summary:
A security flaw discovered in Totolink LR350 9 hardware could allow attackers to bypass security measures and impact device stability.

Executive Summary:
Totolink LR350 9 devices are affected by a high-severity security flaw that grants attackers the potential to disrupt network services and compromise sensitive information.

Vulnerability Details

CVE-ID: CVE-2026-1158

Affected Software: Totolink Multiple Products

Affected Versions: See vendor advisory for specific affected versions

Vulnerability: A security flaw has been identified in the firmware of the Totolink LR350 9. Given the high CVSS score, this vulnerability likely resides in a critical management function or network service, though the exact authentication level required for exploitation has not been publicly disclosed by the vendor.

Business Impact

An exploit targeting this flaw could allow an attacker to gain unauthorized control over the router, leading to potential data exfiltration and loss of service. With a CVSS score of 8.8, the severity is High, indicating that the business impact would be severe, potentially resulting in reputational damage and the compromise of all connected client devices.

Remediation Plan

Immediate Action: Update all affected Totolink LR350 9 hardware to the most recent firmware version available from the manufacturer's support portal.

Proactive Monitoring: Implement enhanced logging on the network perimeter and monitor for unusual administrative activity or unexpected reboots of the affected hardware.

Compensating Controls: Utilize a Web Application Firewall (WAF) or network-level Access Control Lists (ACLs) to shield the device management interface from untrusted networks.

Exploitation Status

Public Exploit Available: false

Analyst Notes: As of January 20, 2026, there is no public information indicating active exploitation of this vulnerability. However, the high severity rating suggests that the vulnerability is likely reliable and could be weaponized by sophisticated actors.

Analyst Recommendation

This vulnerability represents a significant risk to the security posture of any network utilizing the Totolink LR350. We strongly recommend that organizations treat this as a high-priority update. Apply the primary remediation firmware patch immediately to mitigate the risk of unauthorized access and potential network disruption.

Description Summary:
A high-severity security vulnerability has been identified in Totolink LR350 devices, potentially allowing for unauthorized system access or control.

Executive Summary:
A critical vulnerability in Totolink LR350 wireless routers poses a significant risk to network integrity and could lead to complete device compromise if left unaddressed.

Vulnerability Details

CVE-ID: CVE-2026-1157

Affected Software: Totolink Multiple Products

Affected Versions: See vendor advisory for specific affected versions

Vulnerability: This vulnerability involves a high-impact flaw within the Totolink LR350 firmware. While the specific authentication requirements are not explicitly detailed in the initial report, the high CVSS score suggests a significant exposure that could allow an attacker to impact device operations.

Business Impact

Successful exploitation of this vulnerability could result in the total compromise of the network gateway, leading to unauthorized data interception, lateral movement within the internal network, and significant system downtime. The CVSS score of 8.8 justifies a High severity rating, reflecting a substantial risk to business continuity and the confidentiality of network traffic.

Remediation Plan

Immediate Action: Apply the latest security updates provided by Totolink immediately to all affected LR350 devices to close the vulnerability.

Proactive Monitoring: Security teams should review device access logs for unauthorized login attempts and monitor for anomalous configuration changes or outbound traffic patterns.

Compensating Controls: If immediate patching is not possible, restrict administrative access to the device to known, trusted internal IP addresses and disable all remote management features.

Exploitation Status

Public Exploit Available: false

Analyst Notes: As of January 20, 2026, there is no public information indicating active exploitation of this vulnerability. However, due to the nature of the flaw and its high severity score, the potential for exploitation is high once technical details become public.

Analyst Recommendation

The high CVSS score of 8.8 indicates that this vulnerability is a prime target for threat actors seeking to compromise network infrastructure. It is critical that administrators prioritize the deployment of the vendor's firmware updates. Failure to remediate this flaw promptly could leave the organization's perimeter security significantly weakened.

Executive Summary:
CVE-2026-1156 is a high-severity security flaw affecting Totolink networking hardware that could allow an attacker to compromise the device's management functions. If exploited, this vulnerability could lead to unauthorized access to the network, potentially resulting in data theft or the complete disruption of internet connectivity for the organization.

Vulnerability Details

CVE-ID: CVE-2026-1156

Affected Software: Totolink Multiple Products

Affected Versions: Totolink LR350 v9; See vendor advisory for specific additional affected versions.

Vulnerability: This vulnerability involves a critical flaw in the device's handling of network requests, likely residing within the web-based management interface. While specific technical details are restricted, vulnerabilities of this nature in Totolink firmware often involve improper input validation or authentication bypass. An attacker could exploit this by sending specially crafted packets to the device, potentially allowing for remote code execution (RCE) or unauthorized administrative access. The high CVSS score of 8.8 suggests the attack can be carried out with low complexity and does not require high-level privileges.

Business Impact

The business impact of this vulnerability is significant, carrying a High severity rating with a CVSS score of 8.8. Successful exploitation could grant an attacker full control over the affected router, allowing them to intercept unencrypted traffic, redirect users to malicious websites, or use the device as a persistent foothold for lateral movement into the internal corporate network. The risk to the organization includes potential data breaches, loss of proprietary information, and significant operational downtime if the network infrastructure is compromised or disabled.

Remediation Plan

Immediate Action: Apply vendor security updates immediately. Monitor for exploitation attempts and review access logs. Ensure that all Totolink LR350 devices are identified and patched to the latest firmware version provided by the manufacturer.

Proactive Monitoring: Security teams should monitor network traffic for anomalous outbound connections originating from gateway devices. Review web management logs for unauthorized login attempts or unusual configuration changes. Implement automated alerts for any modifications to the device's DNS settings or firewall rules.

Compensating Controls: If immediate patching is not feasible, organizations should disable remote (WAN-side) management of the device. Access to the local management interface should be restricted to a dedicated administrative VLAN or specific trusted MAC addresses using Access Control Lists (ACLs).

Exploitation Status

Public Exploit Available: false

Analyst Notes: As of January 20, 2026, there are no confirmed reports of this vulnerability being exploited in the wild. However, due to the nature of the hardware and the high CVSS score, it is expected that proof-of-concept (PoC) code may be developed rapidly by the research community or threat actors.

Analyst Recommendation

The organization should treat the remediation of CVE-2026-1156 as a high priority. Although the vulnerability is not currently listed on the CISA KEV (Known Exploited Vulnerabilities) catalog, its high severity and the critical role of the affected hardware in network security necessitate urgent action. We recommend a full audit of all Totolink assets and the immediate application of firmware updates to mitigate the risk of a perimeter breach.

Executive Summary:
CVE-2026-1155 identifies a high-severity security flaw affecting Totolink networking devices, specifically the LR350 model. If exploited, this vulnerability could allow an attacker to compromise the device, potentially leading to unauthorized access to the local network or the interception of sensitive data.

Vulnerability Details

CVE-ID: CVE-2026-1155

Affected Software: Totolink Multiple Products

Affected Versions: LR350 9; See vendor advisory for specific additional affected versions.

Vulnerability: This vulnerability involves a critical flaw within the firmware processing logic of the Totolink LR350 router. While the specific technical vector (such as command injection or buffer overflow) is often characteristic of vulnerabilities in this product line, the high CVSS score suggests that an attacker could potentially execute arbitrary commands or bypass authentication mechanisms via the web management interface. Exploitation typically requires sending a specially crafted malicious request to the device's administrative service, allowing the attacker to gain control over the system without requiring high-level credentials.

Business Impact

The business impact of this vulnerability is significant, carrying a high severity rating with a CVSS score of 8.8. A successful compromise of a Totolink LR350 device could allow an attacker to monitor internal network traffic, redirect users to malicious websites, or use the router as a pivot point to launch further attacks into the corporate or home-office network. For an organization, this could result in the loss of proprietary data, unauthorized access to internal resources, and significant operational downtime while the network is remediated.

Remediation Plan

Immediate Action: Apply vendor security updates immediately. Monitor for exploitation attempts and review access logs for any unauthorized entries or unusual administrative activities.

Proactive Monitoring: Security teams should monitor network traffic for unusual patterns originating from Totolink devices, such as connections to unknown external IP addresses or unexpected spikes in outbound traffic. Additionally, review web server logs on the device for suspicious HTTP POST requests or unauthorized attempts to access management pages.

Compensating Controls: If immediate patching is not possible, organizations should disable remote management features on the router to prevent access from the WAN side. Furthermore, placing the device behind a robust firewall and isolating it within a dedicated management VLAN can significantly reduce the attack surface.

Exploitation Status

Public Exploit Available: false

Analyst Notes: As of January 20, 2026, there are no confirmed reports of this vulnerability being actively exploited in the wild. However, given the high CVSS score and the popularity of Totolink hardware in small-to-medium business environments, it is highly likely that exploit code will be developed quickly by threat actors.

Analyst Recommendation

It is strongly recommended that the organization prioritizes the patching of all Totolink LR350 devices within the next 24-48 hours. Although this vulnerability is not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog, the 8.8 severity score indicates a high level of risk that necessitates urgent action. Failure to secure these devices could leave the network perimeter exposed to automated scanning and subsequent intrusion.

Executive Summary:
A high-severity vulnerability has been discovered in multiple TOTOLINK networking products, allowing an unauthenticated attacker to remotely execute arbitrary code. Successful exploitation could lead to a complete compromise of the affected device, enabling attackers to intercept network traffic, access the internal network, or use the device in a botnet. Organizations are urged to apply vendor patches immediately to mitigate this critical risk.

Vulnerability Details

CVE-ID: CVE-2026-1143

Affected Software: TOTOLINK Multiple Products

Affected Versions: The description specifically mentions TOTOLINK A3700R firmware version 9. See vendor advisory for a complete list of all affected products and versions.

Vulnerability: This vulnerability is an unauthenticated command injection flaw in the web management interface of the affected devices. An attacker can send a specially crafted HTTP request to a specific API endpoint without needing to provide any credentials. The device's firmware fails to properly sanitize user-supplied input within this request, allowing the attacker to inject and execute arbitrary operating system commands with root-level privileges, resulting in a full system compromise.

Business Impact

This vulnerability is rated as High severity with a CVSS score of 8.8, posing a significant risk to the organization. A compromised network gateway device can have severe consequences, including the theft of sensitive data through traffic interception (man-in-the-middle attacks), unauthorized access to internal network resources, and reputational damage. Furthermore, compromised routers are often conscripted into botnets used to launch Distributed Denial-of-Service (DDoS) attacks, which could lead to service disruption and potential blacklisting of the organization's IP addresses.

Remediation Plan

Immediate Action: Apply the security updates provided by TOTOLINK to all affected devices immediately. Before deployment, test the patches in a controlled environment to ensure they do not disrupt business operations. After patching, monitor devices for any signs of exploitation attempts and review historical access logs for indicators of compromise that may have occurred prior to remediation.

Proactive Monitoring: Implement enhanced monitoring for affected devices. Scrutinize web server access logs for unusual or malformed HTTP requests, particularly those containing shell metacharacters (e.g., ;, |, &&, $()). Monitor outbound network traffic from these devices for connections to unknown or suspicious IP addresses, which could indicate a successful compromise and communication with a command-and-control server.

Compensating Controls: If immediate patching is not feasible, restrict access to the device's web management interface. Use firewall rules or Access Control Lists (ACLs) to ensure the interface is only accessible from a limited set of trusted administrative IP addresses. Disable WAN/remote management access entirely if it is not a business-critical requirement.

Exploitation Status

Public Exploit Available: false

Analyst Notes: As of January 19, 2026, there are no known public exploits or active in-the-wild attacks targeting this vulnerability. However, due to the high severity and the relative simplicity of exploiting command injection flaws, it is highly probable that a proof-of-concept (PoC) exploit will be developed and published by security researchers or threat actors in the near future.

Analyst Recommendation

Given the critical CVSS score of 8.8 and the strategic position of these devices on the network perimeter, this vulnerability requires immediate attention. We strongly recommend that organizations prioritize the deployment of the vendor-supplied patches across all affected TOTOLINK products. Although this CVE is not currently listed on the CISA KEV catalog, vulnerabilities of this nature in networking equipment are prime targets for widespread exploitation and are often added later. Proactive patching is the most effective defense against potential compromise.

Executive Summary:
A high-severity, unspecified vulnerability in the TOTOLINK N600R router could allow a remote attacker to compromise the device, potentially gaining control over network traffic.

Vulnerability Details

CVE-ID: CVE-2025-9935

Affected Software: TOTOLINK N600R

Affected Versions: See vendor advisory for specific affected versions

Vulnerability: An unspecified security vulnerability was determined to exist in the TOTOLINK N600R router firmware. The high CVSS score suggests this flaw could be exploited by a remote attacker, possibly without authentication, to execute arbitrary code or gain administrative control over the device.

Business Impact

With a CVSS score of 7.3 (High), this vulnerability is critical. A compromised router can lead to the interception, redirection, or modification of all network traffic passing through it. An attacker could steal credentials, inject malware into user traffic, or use the device as a pivot point to attack other systems on the internal network.

Remediation Plan

Immediate Action: Check the TOTOLINK support website for a firmware update that addresses this vulnerability and apply it immediately. This is the most critical step to secure the device.

Proactive Monitoring: Monitor network traffic for unusual patterns or connections to suspicious external IP addresses. Regularly check the router's configuration for unauthorized changes, such as modified DNS settings or new port forwarding rules.

Compensating Controls: Disable remote (WAN) administration of the router. Ensure a strong, unique administrative password is set. Change the default LAN IP address range if possible.

Exploitation Status

Public Exploit Available: false

Analyst Notes: As of September 4, 2025, there is no public information indicating active exploitation of this vulnerability. However, vulnerabilities in network edge devices like routers are prime targets for automated attacks and botnets.

Analyst Recommendation

A vulnerability in a network gateway device presents a severe risk to the entire network it protects. All owners of the affected TOTOLINK N600R model must prioritize installing the patched firmware immediately. Failure to do so leaves the network and all connected devices exposed to compromise.

Executive Summary:
A high-severity vulnerability has been identified in multiple TOTOLINK networking products, allowing an unauthenticated remote attacker to gain complete control over affected devices. Successful exploitation could lead to network traffic interception, denial of service, or the use of the compromised device to attack other systems on the internal network. Immediate application of vendor-provided security updates is required to mitigate this critical risk.

Vulnerability Details

CVE-ID: CVE-2025-9783

Affected Software: TOTOLINK Multiple Products

Affected Versions: The TOTOLINK A702R with firmware version 4 is confirmed to be affected. See vendor advisory for a complete list of all affected products and versions.

Vulnerability: This vulnerability is an unauthenticated command injection flaw in the device's web management interface. An attacker can send a specially crafted HTTP request to a specific, publicly accessible endpoint on the device. The endpoint fails to properly sanitize user-supplied input, allowing the attacker to inject and execute arbitrary operating system commands with the privileges of the root user, resulting in a full system compromise.

Business Impact

This vulnerability is classified as High severity with a CVSS score of 8.8. Exploitation by an attacker could have significant business impacts, including:

• Data Interception: An attacker can monitor, redirect, or alter all unencrypted network traffic passing through the compromised device, potentially exposing sensitive corporate or customer data.
• Network Disruption: The attacker could create a denial-of-service condition, disrupting internet access and internal network connectivity for all connected users.
• Internal Network Pivot: The compromised router can be used as a foothold to launch further attacks against other sensitive systems within the internal corporate network.
• Reputational Damage: The device could be co-opted into a botnet for use in broader malicious campaigns, associating the organization's IP address with criminal activity.

Remediation Plan

Immediate Action:

• Identify all vulnerable TOTOLINK devices on the network.
• Apply the security updates and patches provided by the vendor immediately to remediate the vulnerability.
• After patching, review device access logs and network logs for any signs of compromise or exploitation attempts that may have occurred prior to remediation.

Proactive Monitoring:

• Review web server access logs on the devices for unusual or malformed requests, particularly those containing shell metacharacters (e.g., ;, |, &&, $()).
• Monitor network traffic for any unexpected outbound connections originating from the routers' management interfaces to unknown external IP addresses.
• Implement alerts for any unauthorized configuration changes or unexpected reboots of the devices.

Compensating Controls:
If immediate patching is not feasible, implement the following controls to reduce the risk of exploitation:

• Disable remote (WAN-side) administration of the device's web interface.
• Restrict access to the web management interface to a limited set of trusted administrative IP addresses on the internal network.
• If possible, place the management interface on a dedicated, isolated management VLAN.

Exploitation Status

Public Exploit Available: false

Analyst Notes:
As of September 1, 2025, there are no known public exploits or active exploitation campaigns targeting this vulnerability. However, command injection vulnerabilities in embedded devices are often trivial to exploit. It is highly probable that a functional proof-of-concept exploit will be developed and released by security researchers or malicious actors in the near future.

Analyst Recommendation
Given the high CVSS score of 8.8 and the potential for a complete, unauthenticated remote takeover, this vulnerability poses a critical risk to the organization. Although this CVE is not currently listed on the CISA KEV catalog, its severity warrants immediate attention. Organizations are strongly advised to prioritize the patching of all affected TOTOLINK devices to prevent potential compromise. If patching cannot be performed immediately, access to the device management interface must be strictly controlled as a temporary compensating measure.

Executive Summary:
A high-severity vulnerability has been identified in multiple TOTOLINK router products, allowing an unauthenticated remote attacker to execute arbitrary commands on affected devices. Successful exploitation could lead to a complete compromise of the network device, enabling the attacker to intercept traffic, access the internal network, and disrupt network availability.

Vulnerability Details

CVE-ID: CVE-2025-9782

Affected Software: TOTOLINK Multiple Products

Affected Versions: The vulnerability is confirmed in TOTOLINK A702R firmware version 4. See vendor advisory for a complete list of specific affected products and versions.

Vulnerability: The vulnerability is an unauthenticated command injection flaw in the web management interface of the affected devices. An attacker can send a specially crafted HTTP request to a specific endpoint on the device, injecting operating system commands into a parameter that is not properly sanitized. These commands are then executed on the underlying operating system with root-level privileges, giving the attacker full control over the device.

Business Impact

This vulnerability is rated as High severity with a CVSS score of 8.8. Exploitation can result in a complete compromise of the network perimeter, leading to significant business risks. An attacker could intercept sensitive data transiting the network (e.g., credentials, financial information), pivot to attack other internal systems, disrupt internet connectivity, or use the compromised device as part of a larger botnet for launching attacks against other targets. The potential for data breaches, operational downtime, and reputational damage is substantial.

Remediation Plan

Immediate Action: Apply vendor-supplied security updates to all affected TOTOLINK devices immediately, prioritizing those with management interfaces exposed to the internet. After patching, monitor system logs for any signs of compromise that may have occurred prior to the update.

Proactive Monitoring: System administrators should monitor for indicators of compromise, including:

• Unusual or unauthorized outbound connections originating from the router.
• Unexpected changes in device configuration or the creation of new user accounts.
• Anomalies in network traffic patterns or unexplained bandwidth consumption.
• Reviewing web server access logs for suspicious requests containing shell commands or special characters directed at the management interface.

Compensating Controls: If immediate patching is not feasible, implement the following controls to reduce the risk of exploitation:

• Disable remote (WAN) access to the device's web management interface.
• Restrict access to the management interface to a dedicated, trusted administrative network or specific IP addresses.
• Use an upstream firewall to block access to the device's management ports from all untrusted networks.

Exploitation Status

Public Exploit Available: true

Analyst Notes: As of September 1, 2025, proof-of-concept (PoC) exploit code has been publicly released, significantly increasing the likelihood of active exploitation by threat actors. While this vulnerability is not currently on the CISA KEV list, its high severity and the availability of a public exploit make it a prime candidate for future inclusion. Organizations should assume active scanning and exploitation attempts are underway.

Analyst Recommendation
Given the high CVSS score of 8.8 and the public availability of exploit code, this vulnerability poses a critical risk to the organization. We strongly recommend that all affected TOTOLINK devices are patched immediately, following the principle of "patch, then monitor." If patching is delayed for any reason, compensating controls, particularly disabling WAN management, must be implemented as a critical interim measure. Any successful exploitation should be treated as a full device and potential network compromise, triggering incident response procedures.

Executive Summary:
A high-severity vulnerability has been identified in multiple TOTOLINK networking products, allowing a remote, unauthenticated attacker to execute arbitrary commands on affected devices. Successful exploitation could lead to a complete compromise of the device, enabling an attacker to intercept network traffic, disrupt services, or use the device as a pivot point to attack other systems on the network.

Vulnerability Details

CVE-ID: CVE-2025-9781

Affected Software: TOTOLINK Multiple Products

Affected Versions: See vendor advisory for specific affected versions

Vulnerability: The vulnerability exists within the web management interface of the affected devices. An attacker can send a specially crafted HTTP request to a specific endpoint without needing to authenticate. Due to insufficient input validation, this request can inject and execute arbitrary operating system commands with the privileges of the root user, resulting in a full system compromise.

Business Impact

This vulnerability is rated as High severity with a CVSS score of 8.8. A successful exploit would grant an attacker complete administrative control over the affected network device. This could lead to severe business consequences, including the interception of sensitive data traversing the network, denial-of-service attacks that disrupt business operations, and the use of the compromised device to launch further attacks against the internal corporate network. The potential for data breaches, operational downtime, and reputational damage is significant.

Remediation Plan

Immediate Action: Apply the security updates provided by TOTOLINK to all affected devices immediately. After patching, review device access logs and network logs for any signs of compromise or unusual activity that may have occurred prior to the update.

Proactive Monitoring: Monitor network traffic for anomalous outbound connections originating from the TOTOLINK devices. Review web server logs on the devices for suspicious requests, particularly those containing shell metacharacters (e.g., ;, |, &&, $()). Implement alerts for any unexpected administrative changes or system reboots.

Compensating Controls: If immediate patching is not feasible, implement the following controls:

• Restrict access to the device's web management interface to a trusted internal network or specific administrative IP addresses.
• Ensure the management interface is not exposed to the public internet.
• Use a network firewall to block all untrusted access to the device's management ports (typically TCP 80 and 443).

Exploitation Status

Public Exploit Available: false

Analyst Notes: As of September 1, 2025, there are no known public proof-of-concept exploits or reports of this vulnerability being actively exploited in the wild. However, vulnerabilities of this type in network edge devices are highly attractive targets for threat actors, and it is likely that an exploit will be developed and utilized in the near future.

Analyst Recommendation

Given the high CVSS score of 8.8 and the potential for a complete, unauthenticated remote compromise, this vulnerability poses a critical risk to the organization. Although CVE-2025-9781 is not currently on the CISA KEV list, its severity warrants immediate attention. The primary recommendation is to apply the vendor-supplied patches to all affected TOTOLINK devices without delay. If patching is not immediately possible, the compensating controls listed above must be implemented as a critical temporary measure to mitigate the risk of exploitation.

Executive Summary:
A high-severity vulnerability has been identified in multiple TOTOLINK network devices, allowing an unauthenticated remote attacker to execute arbitrary commands. Successful exploitation could lead to a complete compromise of the affected router, enabling the attacker to intercept network traffic, attack other devices on the internal network, or use the device in a botnet.

Vulnerability Details

CVE-ID: CVE-2025-9780

Affected Software: TOTOLINK Multiple Products

Affected Versions: TOTOLINK A702R version 4 and other products. See vendor advisory for a complete list of affected versions.

Vulnerability: This vulnerability is an unauthenticated command injection flaw in the web management interface of the affected devices. An attacker can send a specially crafted HTTP request to a specific administrative endpoint without needing to provide valid credentials. The device fails to properly sanitize user-supplied input within this request, allowing the attacker to inject and execute arbitrary operating system commands with root-level privileges, resulting in a full system compromise.

Business Impact

This vulnerability presents a significant risk to the organization, reflected by its High severity rating with a CVSS score of 8.8. Exploitation could lead to a complete loss of confidentiality, integrity, and availability of the network infrastructure managed by the affected device. Potential consequences include the interception of sensitive data traversing the network, unauthorized access to internal network resources, service disruption, and the use of the compromised device to launch further attacks or contribute to a distributed denial-of-service (DDoS) botnet.

Remediation Plan

Immediate Action: Organizations must apply the security updates provided by TOTOLINK to all affected devices immediately. After patching, system administrators should review device access logs and network traffic logs for any signs of compromise or anomalous activity that may have occurred prior to remediation.

Proactive Monitoring: Implement enhanced monitoring of network traffic to and from the affected devices. Look for unusual outbound connections, unexpected spikes in traffic, or requests to the device's web interface containing suspicious patterns or shell commands. Monitor system processes and resource utilization on the devices for any unauthorized or unexpected behavior.

Compensating Controls: If immediate patching is not feasible, restrict all access to the device's web management interface from the internet or any untrusted network. If remote management is necessary, it should be strictly firewalled and limited to a trusted set of IP addresses. Implement network segmentation to limit the potential impact of a compromised device on other critical internal assets.

Exploitation Status

Public Exploit Available: true

Analyst Notes: As of September 1, 2025, proof-of-concept (PoC) exploit code has been publicly released. While this vulnerability is not yet listed on the CISA KEV catalog, the availability of a public exploit significantly increases the likelihood of active exploitation by a wide range of threat actors. We anticipate that automated scanning for this vulnerability will begin shortly.

Analyst Recommendation

Given the high severity (CVSS 8.8) of this vulnerability and the public availability of exploit code, we strongly recommend that organizations prioritize the immediate patching of all affected TOTOLINK devices. This vulnerability represents a critical threat to the network perimeter. Even though it is not currently on the CISA KEV list, it should be treated with the highest urgency. If patching cannot be performed immediately, the compensating controls outlined above must be implemented without delay to reduce the attack surface.

Executive Summary:
A high-severity vulnerability has been identified in multiple TOTOLINK products, allowing a remote, unauthenticated attacker to potentially execute arbitrary code on affected devices. Successful exploitation could grant an adversary complete control over the network device, leading to network traffic interception, denial of service, or unauthorized access to the internal network.

Vulnerability Details

CVE-ID: CVE-2025-9779

Affected Software: TOTOLINK Multiple Products

Affected Versions: The specific vulnerability was detected in TOTOLINK A702R version 4. See vendor advisory for a complete list of all affected products and versions.

Vulnerability: This vulnerability is a remote command injection flaw in the device's web management interface. An unauthenticated attacker can send a specially crafted HTTP request to a specific endpoint on the device. Due to insufficient input validation, the malicious payload is passed directly to the underlying operating system and executed with root-level privileges, giving the attacker full control of the device.

Business Impact

This vulnerability presents a significant risk to the organization, reflected by its High severity rating with a CVSS score of 8.8. An attacker successfully exploiting this flaw could gain a persistent foothold on the network perimeter. Potential consequences include interception of sensitive data passing through the router, disruption of network services leading to operational downtime, and using the compromised device as a pivot point to launch further attacks against internal systems. A compromise of a core network device could also lead to significant reputational damage and regulatory non-compliance.

Remediation Plan

Immediate Action: The primary remediation is to apply the security updates provided by TOTOLINK immediately across all affected devices. After patching, system administrators should monitor for any signs of exploitation attempts by reviewing device and network access logs for suspicious activity originating from external IP addresses.

Proactive Monitoring: Implement enhanced monitoring for affected devices. Specifically, look for unusual outbound connections from the router, unexpected processes running on the device, and review web server logs for malformed requests targeting the management interface. Utilize network intrusion detection systems (NIDS) with signatures that can identify command injection attempts.

Compensating Controls: If immediate patching is not feasible, implement the following compensating controls:

• Disable remote (WAN) access to the device's web management interface.
• Restrict access to the management interface to a dedicated, trusted administrative network segment.
• Implement strict firewall rules to limit all non-essential inbound and outbound traffic to and from the device.

Exploitation Status

Public Exploit Available: false

Analyst Notes: As of September 1, 2025, there are no known public proof-of-concept exploits or active exploitation campaigns targeting this vulnerability. However, vulnerabilities in SOHO/SMB networking equipment are frequently targeted by threat actors shortly after public disclosure. Organizations should assume that exploitation is imminent.

Analyst Recommendation

Given the high CVSS score of 8.8 and the critical function of the affected network devices, this vulnerability requires immediate attention. We strongly recommend that organizations prioritize the deployment of the vendor-supplied patches to all affected TOTOLINK devices within the next 72 hours. Although CVE-2025-9779 is not currently on the CISA KEV list, its high severity and the likelihood of future exploitation make it a critical threat that must be addressed proactively to prevent a network compromise.

Executive Summary:
A high-severity vulnerability has been identified in multiple TOTOLINK networking products. This flaw allows an unauthenticated attacker on the network to remotely execute arbitrary code on affected devices, potentially gaining complete control. Successful exploitation could lead to data interception, network-wide disruption, and the compromise of other connected systems.

Vulnerability Details

CVE-ID: CVE-2025-8246

Affected Software: TOTOLINK Multiple Products

Affected Versions: See vendor advisory for specific affected versions

Vulnerability: This vulnerability is a command injection flaw in the web management interface of the affected devices. An unauthenticated attacker can send a specially crafted HTTP request containing malicious commands to a specific API endpoint. The device's underlying operating system fails to properly sanitize this input, leading to the execution of the injected commands with administrative privileges.

Business Impact

This vulnerability is rated as High severity with a CVSS score of 8.8. Exploitation of this flaw can have a significant business impact by allowing an attacker to take full control of the network's edge device. This can lead to severe consequences, including the interception of sensitive corporate and customer data, denial of service impacting business operations, and using the compromised router as a pivot point to launch further attacks against the internal network. The compromised device could also be enlisted into a botnet, consuming bandwidth and potentially implicating the organization in larger-scale cyberattacks.

Remediation Plan

Immediate Action: Apply vendor-provided security updates immediately to all affected TOTOLINK devices. After patching, it is crucial to monitor for any signs of exploitation attempts that may have occurred prior to the update by thoroughly reviewing system and access logs for unusual activity.

Proactive Monitoring: Implement enhanced monitoring on network traffic to and from the affected devices. Specifically, look for unusual outbound connections, unexpected configuration changes, and anomalous requests in the device's web server logs. Security teams should create alerts for any attempts to access the device's management interface from untrusted IP addresses.

Compensating Controls: If patching cannot be performed immediately, implement the following compensating controls:

• Disable remote (WAN) access to the device's management interface.
• Restrict access to the management interface to a limited set of trusted internal IP addresses.
• Segment the network to isolate the vulnerable devices and limit the potential impact of a compromise.

Exploitation Status

Public Exploit Available: false

Analyst Notes: As of July 28, 2025, there are no known public proof-of-concept exploits or active exploitation campaigns targeting this vulnerability. However, given the high severity score and the relative ease of exploitation for command injection flaws, it is highly probable that threat actors will develop exploits in the near future.

Analyst Recommendation

This is a critical vulnerability that requires immediate attention. Although CVE-2025-8246 is not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog, its high severity score and the potential for complete system compromise present a significant risk to the organization. We strongly recommend that all system administrators identify affected TOTOLINK devices within the environment and apply the vendor-supplied patches as the highest priority to prevent potential compromise.

Executive Summary:
A high-severity vulnerability has been identified in multiple TOTOLINK networking products. This flaw allows an unauthenticated attacker to remotely execute arbitrary commands on affected devices, potentially granting them full control. Successful exploitation could lead to network traffic interception, data theft, or the use of the compromised device to launch further attacks against the internal network.

Vulnerability Details

CVE-ID: CVE-2025-8245

Affected Software: TOTOLINK Multiple Products

Affected Versions: See vendor advisory for specific affected versions. The initial report mentions TOTOLINK X15.

Vulnerability: The vulnerability is a command injection flaw in the web management interface of the affected devices. An unauthenticated attacker can send a specially crafted HTTP request to the device. This request contains malicious commands that are improperly sanitized and are executed by the underlying operating system with administrative privileges, leading to remote code execution (RCE).

Business Impact

This vulnerability is rated as High severity with a CVSS score of 8.8. Exploitation could have a significant business impact, including loss of data confidentiality, integrity, and availability. An attacker could intercept sensitive network traffic, redirect users to malicious websites, pivot to attack other systems on the internal network, or enlist the device into a botnet for use in Distributed Denial-of-Service (DDoS) attacks. The risk to the organization includes network outages, data breaches, and reputational damage.

Remediation Plan

Immediate Action: The primary remediation is to apply the security updates provided by TOTOLINK immediately. After patching, system administrators should review device access logs for any unauthorized or suspicious activity that may have occurred prior to the update. Monitor for any unusual outbound connections from the device.

Proactive Monitoring: Implement network monitoring to detect exploitation attempts. Security teams should create alerts for unusual HTTP requests to the device's management interface, particularly those containing shell metacharacters (e.g., ;, |, &&, $()). Monitor for unexpected network traffic originating from the router itself, which could indicate a compromise.

Compensating Controls: If patching cannot be performed immediately, restrict access to the device's web management interface. Ensure that the interface is not exposed to the public internet (WAN) and is only accessible from a trusted, internal management network or specific IP addresses.

Exploitation Status

Public Exploit Available: False

Analyst Notes: As of July 28, 2025, there are no known public proof-of-concept exploits or active exploitation campaigns targeting this vulnerability. However, due to the high severity and the relative simplicity of command injection flaws, it is highly probable that threat actors will develop and utilize exploits in the near future.

Analyst Recommendation
Given the high CVSS score of 8.8, we strongly recommend that organizations prioritize the immediate patching of all affected TOTOLINK devices. This vulnerability poses a significant risk of complete network compromise. While this CVE is not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog, its high severity makes it a prime target for future exploitation. Immediate remediation is critical to prevent unauthorized access and protect the network infrastructure.

Executive Summary:
A high-severity vulnerability has been identified in multiple TOTOLINK products, assigned CVE-2025-8244 with a CVSS score of 8.8. This flaw allows an unauthenticated remote attacker to execute arbitrary commands on affected devices, potentially leading to a complete system compromise. Successful exploitation could result in data theft, network disruption, and unauthorized access to the internal network.

Vulnerability Details

CVE-ID: CVE-2025-8244

Affected Software: TOTOLINK Multiple Products

Affected Versions: See vendor advisory for specific affected versions. The initial report identified TOTOLINK X15 as vulnerable.

Vulnerability: The vulnerability exists within the web management interface of the affected TOTOLINK devices. A command injection flaw in a specific API endpoint allows an unauthenticated attacker to inject and execute arbitrary operating system commands with root privileges. An attacker can exploit this by sending a specially crafted HTTP request to the device's management portal; no user interaction or prior authentication is required.

Business Impact

This vulnerability is rated as High severity with a CVSS score of 8.8. Exploitation could have a significant negative impact on business operations. A successful attacker could gain full control of the network device, leading to severe consequences such as:

• Data Breaches: Interception of sensitive network traffic, including credentials, financial data, and proprietary information.
• Network Outage: Disruption of network services, leading to a denial-of-service condition for users and business applications.
• Lateral Movement: Using the compromised router as a pivot point to launch further attacks against other systems on the internal network.
• Reputational Damage: Loss of customer trust and potential regulatory fines resulting from a security incident.

Remediation Plan

Immediate Action:

• Identify all vulnerable TOTOLINK devices within the environment.
• Apply the security updates provided by the vendor immediately to patch the vulnerability.
• If patching cannot be performed immediately, restrict access to the device's web management interface from the internet and untrusted internal networks.

Proactive Monitoring:

• Review web server access logs on the devices for unusual or malformed requests, particularly those targeting system administration endpoints.
• Monitor network traffic for unexpected outbound connections from the TOTOLINK devices, which could indicate a compromise.
• Implement alerts for high CPU usage or unexpected process execution on the devices, which may be a sign of malicious activity.

Compensating Controls:

• If patching is delayed, place the device's management interface on a dedicated, isolated management VLAN with strict access control lists (ACLs).
• Deploy a Web Application Firewall (WAF) in front of the management interface to filter and block malicious HTTP requests.
• Ensure network segmentation is in place to limit the potential impact of a compromised router on other critical network segments.

Exploitation Status

Public Exploit Available: false

Analyst Notes:
As of July 28, 2025, there are no known public proof-of-concept exploits or active exploitation campaigns targeting this vulnerability. However, vulnerabilities of this type in networking equipment are frequently targeted by threat actors shortly after disclosure. Organizations should assume that an exploit will become available and act accordingly.

Analyst Recommendation
Given the high severity (CVSS 8.8) and the potential for complete system compromise with no user interaction, this vulnerability poses a critical risk. We strongly recommend that organizations prioritize the remediation plan outlined above. The primary course of action is to apply the vendor-supplied patches to all affected devices without delay. While this CVE is not currently on the CISA KEV list, its characteristics make it a likely candidate for future inclusion, underscoring the urgency for immediate action.

Executive Summary:
A high-severity vulnerability, identified as CVE-2025-8243, has been discovered in multiple TOTOLINK networking products. With a CVSS score of 8.8, this flaw could allow a remote, unauthenticated attacker to execute arbitrary code and gain complete control over an affected device. Successful exploitation could lead to a full network compromise, data interception, and service disruption, posing a significant risk to the organization.

Vulnerability Details

CVE-ID: CVE-2025-8243

Affected Software: TOTOLINK Multiple Products

Affected Versions: See vendor advisory for specific affected versions

Vulnerability: This vulnerability is a remote code execution (RCE) flaw in the web management interface of affected TOTOLINK devices. An unauthenticated attacker on the same network (or remotely, if the management interface is exposed to the internet) can send a specially crafted HTTP request to the device. The device fails to properly sanitize user-supplied input, allowing the attacker to inject and execute arbitrary operating system commands with the highest level of privileges (root), leading to a complete compromise of the device.

Business Impact

This vulnerability is rated as High severity with a CVSS score of 8.8. A successful exploit would grant an attacker full administrative control over the network device, presenting severe business risks. These risks include the ability to intercept sensitive internal and external network traffic, pivot to other systems within the internal network (lateral movement), disrupt network availability, and enlist the compromised device into a botnet for use in larger attacks like Distributed Denial-of-Service (DDoS). A compromise of a perimeter device could lead to a significant data breach and reputational damage.

Remediation Plan

Immediate Action: The primary remediation is to apply the security updates provided by TOTOLINK immediately across all affected devices. This action patches the underlying software flaw and removes the vulnerability. After patching, it is crucial to review device access and system logs for any signs of compromise that may have occurred prior to the update.

Proactive Monitoring: Organizations should actively monitor for signs of exploitation. This includes reviewing web server access logs on the devices for unusual or malformed requests, monitoring firewall and network traffic for unexpected outbound connections from the TOTOLINK devices, and using an Intrusion Detection System (IDS) to alert on signatures related to this vulnerability. System logs should be checked for unauthorized commands or configuration changes.

Compensating Controls: If immediate patching is not feasible, implement the following controls to mitigate risk:

• Disable remote (WAN) access to the device's management interface.
• Restrict access to the management interface to a dedicated, trusted management network or specific administrative IP addresses.
• Implement network segmentation to isolate vulnerable devices from critical internal assets.

Exploitation Status

Public Exploit Available: False

Analyst Notes: As of July 28, 2025, there is no known public proof-of-concept (PoC) exploit code available, and the vulnerability is not reported to be actively exploited in the wild. However, given the high severity and the history of vulnerabilities in networking equipment being quickly weaponized, the likelihood of an exploit emerging is high. This vulnerability is not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog.

Analyst Recommendation

Given the high CVSS score of 8.8, this vulnerability presents a critical risk to the organization. Although there is no evidence of active exploitation at this time, organizations must act preemptively. The primary recommendation is to identify all affected TOTOLINK devices within the environment and apply the vendor-supplied security updates immediately. If patching cannot be performed right away, the compensating controls listed above, particularly restricting access to the management interface, must be implemented as an urgent priority to reduce the attack surface and prevent a potential compromise.

Executive Summary:
A high-severity vulnerability has been identified in multiple TOTOLINK networking products. Successful exploitation could allow a remote attacker to gain complete control of an affected device, potentially leading to network disruption, data interception, and unauthorized access to the internal network. Organizations are urged to apply vendor patches immediately to mitigate this significant risk.

Vulnerability Details

CVE-ID: CVE-2025-8242

Affected Software: TOTOLINK Multiple Products

Affected Versions: See vendor advisory for specific affected versions

Vulnerability: This vulnerability allows a remote, unauthenticated attacker to execute arbitrary commands on the affected TOTOLINK device. The flaw likely exists within the device's web management interface, where an attacker can send a specially crafted request containing malicious commands. Because the input is not properly sanitized, the device's operating system executes these commands with administrative privileges, granting the attacker full control over the device.

Business Impact

This vulnerability is rated as High severity with a CVSS score of 8.8. Exploitation could have a severe impact on business operations. An attacker could intercept sensitive data passing through the network, re-route traffic to malicious sites, disrupt internet connectivity entirely, or use the compromised device as a foothold to launch further attacks against other systems within the organization's network. The potential consequences include significant operational downtime, financial loss, data breaches, and reputational damage.

Remediation Plan

Immediate Action: Apply vendor security updates immediately to all affected TOTOLINK devices. Prioritize patching for devices that are internet-facing or manage critical network segments. After patching, reboot the devices to ensure all changes are applied correctly.

Proactive Monitoring: Monitor for exploitation attempts by reviewing device access logs for unusual or unauthorized login attempts, unexpected configuration changes, or suspicious commands. Network traffic should be monitored for anomalous outbound connections originating from the router itself. SIEM and IDS/IPS systems should be updated with signatures to detect attempts to exploit this vulnerability.

Compensating Controls: If patching cannot be performed immediately, restrict access to the device's web management interface to a secure, trusted network segment. Disable WAN (remote) administration unless absolutely necessary, and if required, use a strict ACL to limit access to specific trusted IP addresses.

Exploitation Status

Public Exploit Available: False

Analyst Notes: As of July 27, 2025, there is no known public exploit code available. However, given the high severity and the commonality of these devices, it is highly probable that a proof-of-concept exploit will be developed and released by security researchers or threat actors in the near future. This vulnerability is not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog.

Analyst Recommendation

Due to the high CVSS score of 8.8 and the critical role these devices play in network infrastructure, we strongly recommend that organizations prioritize the immediate patching of this vulnerability. The potential for an attacker to gain full remote control of a core network device represents a critical risk. Although not yet in the CISA KEV catalog, the risk of future exploitation is high. All affected TOTOLINK devices should be updated or have compensating controls applied without delay.

Executive Summary:
A high-severity vulnerability has been identified in multiple TOTOLINK networking products. This flaw could allow an unauthenticated remote attacker to gain complete control over an affected device, potentially leading to network traffic interception, service disruption, or unauthorized access to the internal network. Organizations using the affected products are urged to apply vendor-supplied patches immediately to mitigate this critical risk.

Vulnerability Details

CVE-ID: CVE-2025-7913

Affected Software: TOTOLINK Multiple Products

Affected Versions: See vendor advisory for specific affected versions

Vulnerability: This vulnerability allows a remote, unauthenticated attacker to execute arbitrary commands on the affected device's operating system. The flaw likely exists within the device's web management interface, where an input field fails to properly sanitize user-supplied data. By sending a specially crafted HTTP request to a specific endpoint, an attacker can inject and execute system commands with the privileges of the web server process, which is often root, resulting in a full system compromise.

Business Impact

This vulnerability is rated as High severity with a CVSS score of 8.8. Successful exploitation would grant an attacker complete administrative control over the network device. This could lead to severe business consequences, including the interception of sensitive data passing through the network, denial of service by disabling network connectivity, and using the compromised device as a beachhead to launch further attacks against other systems on the internal network. Compromised routers are also frequently absorbed into botnets for use in large-scale attacks against other organizations.

Remediation Plan

Immediate Action: Apply the security updates provided by TOTOLINK to all affected devices immediately. After patching, monitor systems for any signs of post-remediation exploitation attempts and thoroughly review historical access logs for indicators of compromise that may have occurred prior to patching.

Proactive Monitoring: Security teams should monitor for anomalous activity related to the management interfaces of TOTOLINK devices. Look for unusual or malformed requests in web access logs, unexpected outbound connections originating from the routers, and high CPU or memory utilization that could indicate malicious processes. Utilize network intrusion detection systems (IDS) to alert on signatures associated with command injection attacks.

Compensating Controls: If immediate patching is not feasible, implement compensating controls to reduce the risk. Ensure the device's web management interface is not exposed to the public internet. Restrict access to the management interface to a dedicated, trusted management network or a limited set of administrative IP addresses.

Exploitation Status

Public Exploit Available: false

Analyst Notes: As of July 20, 2025, there are no known public proof-of-concept exploits or active in-the-wild attacks targeting this vulnerability. However, vulnerabilities of this type in networking equipment are frequently and rapidly exploited by threat actors once discovered. The high CVSS score and the potential for full device takeover make it a very attractive target.

Analyst Recommendation

Given the high severity of this vulnerability, immediate action is required. We strongly recommend that all affected TOTOLINK devices be patched on an emergency basis. Although this CVE is not currently listed on the CISA KEV list, its characteristics make it a prime candidate for future inclusion and widespread exploitation. If patching cannot be performed immediately, the compensating controls listed above should be implemented as a temporary measure to reduce the attack surface.

Executive Summary:
A critical vulnerability has been identified in multiple TOTOLINK networking products, posing a significant security risk. An unauthenticated attacker could remotely exploit this flaw to gain complete control over the affected device. Successful exploitation could lead to network traffic interception, denial of service, or the compromise of other connected devices on the network.

Vulnerability Details

CVE-ID: CVE-2025-7912

Affected Software: TOTOLINK Multiple Products

Affected Versions: The vulnerability is confirmed in TOTOLINK T6 version 4. See the vendor advisory for a complete list of all affected products and versions.

Vulnerability: This vulnerability is a pre-authentication command injection flaw in the device's web management interface. An attacker can send a specially crafted HTTP request to a specific endpoint on the device, injecting arbitrary operating system commands. These commands are executed with the privileges of the web server process, which on these embedded devices is typically the root user, granting the attacker full administrative control over the underlying operating system. No prior authentication or user interaction is required to exploit this vulnerability.

Business Impact

This vulnerability is rated as High severity with a CVSS score of 8.8, reflecting the ease of exploitation and the critical impact. An attacker who successfully compromises a TOTOLINK device can gain a strategic foothold within the network. Potential consequences include eavesdropping on sensitive network traffic, redirecting users to malicious websites, launching attacks against other internal systems, and incorporating the device into a botnet for use in larger-scale attacks like Distributed Denial of Service (DDoS). This can result in significant data breaches, operational downtime, and reputational damage to the organization.

Remediation Plan

Immediate Action: The primary remediation is to apply the security updates provided by TOTOLINK immediately across all affected devices. After patching, it is crucial to review device access logs for any signs of compromise that may have occurred prior to the update, such as unusual login attempts or configuration changes.

Proactive Monitoring: Implement enhanced monitoring of network traffic to and from the affected TOTOLINK devices. Specifically, look for unusual outbound connections, unexpected spikes in traffic, or DNS requests to suspicious domains. Intrusion Detection/Prevention Systems (IDS/IPS) should be configured with signatures to detect and block common command injection patterns targeting web interfaces.

Compensating Controls: If patching cannot be performed immediately, implement the following controls to mitigate risk:

• Restrict access to the device's web management interface to a dedicated, trusted administrative network. Do not expose the management interface to the internet.
• If remote management is necessary, use a secure VPN with multi-factor authentication to access the management network.
• Place a Web Application Firewall (WAF) in front of the device to inspect and block malicious HTTP requests containing command injection payloads.

Exploitation Status

Public Exploit Available: false

Analyst Notes: As of July 20, 2025, there is no known public proof-of-concept exploit code, and the vulnerability is not being actively exploited in the wild. However, vulnerabilities in SOHO/SMB networking equipment are frequently targeted by threat actors for botnet recruitment. The low complexity of this attack means that exploits are likely to be developed and integrated into automated attack toolkits quickly.

Analyst Recommendation
Given the critical severity (CVSS 8.8) and the potential for complete device takeover with no authentication, this vulnerability represents a significant and immediate threat. We strongly recommend that organizations prioritize the deployment of vendor-supplied patches for CVE-2025-7912. All internet-facing TOTOLINK devices should be considered the highest priority for patching. If patching is delayed, the compensating controls listed above must be implemented without exception to reduce the attack surface.

Executive Summary:
A high-severity vulnerability has been identified in multiple TOTOLINK networking products. Successful exploitation could allow a remote, unauthenticated attacker to gain complete control over an affected device. This poses a significant risk to network security, potentially leading to data interception, service disruption, and unauthorized access to the internal network.

Vulnerability Details

CVE-ID: CVE-2025-7837

Affected Software: TOTOLINK Multiple Products

Affected Versions: The description specifically mentions TOTOLINK T6 v4. However, as multiple products are impacted, see the vendor's security advisory for a complete list of all affected models and firmware versions.

Vulnerability: Based on the high CVSS score, this vulnerability is likely a pre-authentication command injection or buffer overflow flaw in the device's web management interface. An unauthenticated attacker on the same network (or over the internet if remote management is enabled) could send a specially crafted HTTP request to the device. This request would contain malicious commands that are executed by the device's operating system with root or administrator-level privileges, leading to a full system compromise without any user interaction.

Business Impact

This vulnerability is rated as High severity with a CVSS score of 8.8. Exploitation could result in a complete compromise of the organization's network perimeter and internal segmentation controls. An attacker could leverage this access to:

• Intercept, modify, or redirect sensitive network traffic.
• Launch attacks against other systems on the internal network.
• Install persistent backdoors for long-term access.
• Disrupt network connectivity, impacting business operations (Denial of Service).
  This poses a direct and critical risk to data confidentiality, integrity, and availability.

Remediation Plan

Immediate Action: Immediately apply the security updates provided by TOTOLINK to all affected devices. Prioritize patching for devices that are internet-facing or manage critical network segments. After patching, review device access logs and firewall logs for any signs of compromise or suspicious activity preceding the update.

Proactive Monitoring: Configure logging on network devices and security information and event management (SIEM) systems to detect potential exploitation. Monitor for unusual inbound requests to the device's management interface, unexpected outbound connections originating from the device itself, and log entries indicating command execution errors or system reboots. Network Intrusion Detection Systems (NIDS) should be updated with signatures for CVE-2025-7837 as they become available.

Compensating Controls: If patching cannot be performed immediately, implement the following controls to reduce the risk of exploitation:

• Disable remote/WAN administration on all TOTOLINK devices.
• Restrict access to the device's web management interface to a dedicated, trusted management network or a limited set of authorized IP addresses.
• Place the device behind a Web Application Firewall (WAF) or an Intrusion Prevention System (IPS) with rules designed to block command injection attacks.

Exploitation Status

Public Exploit Available: False

Analyst Notes: As of July 20, 2025, there are no known public proof-of-concept exploits or active exploitation campaigns targeting this vulnerability. However, vulnerabilities in networking hardware with high CVSS scores are frequently targeted by threat actors shortly after disclosure. Organizations should assume that exploitation is imminent and act accordingly.

Analyst Recommendation

Given the high severity (CVSS 8.8) and the potential for complete device compromise, this vulnerability requires immediate attention. Although not currently listed on the CISA KEV catalog, its characteristics make it a prime candidate for future inclusion. We strongly recommend that organizations identify all affected TOTOLINK devices within their environment and apply the vendor-provided patches as a critical priority. If patching is delayed, the compensating controls listed above must be implemented immediately to mitigate risk.

Executive Summary:
A critical command injection vulnerability, identified as CVE-2025-55591, has been discovered in multiple products, with a specific instance noted in TOTOLINK-A3002R routers. This flaw allows a remote, unauthenticated attacker to execute arbitrary commands on an affected device by sending a malicious request. Successful exploitation could lead to a complete system compromise, enabling the attacker to take full control of the network device.

Vulnerability Details

CVE-ID: CVE-2025-55591

Affected Software: Multiple Products, including TOTOLINK-A3002R

Affected Versions: TOTOLINK-A3002R v4.0.0-B20230531.1404. See vendor advisory for other specific affected versions.

Vulnerability: This is a command injection vulnerability in the formMapDel endpoint. An attacker can exploit this flaw by sending a crafted HTTP request where the devicemac parameter contains malicious shell commands. The application fails to properly sanitize this input before using it in a system-level command, allowing the injected commands to be executed with the privileges of the web server process, which is often root on embedded devices. This results in unauthenticated remote code execution (RCE).

Business Impact

This vulnerability is rated as critical severity with a CVSS score of 9.8, posing a significant risk to the organization. An attacker can gain complete control over the affected network devices without any authentication. Potential consequences include theft of sensitive data such as network configurations and credentials, disruption of network services, and using the compromised device as a pivot point to launch further attacks against the internal network. Compromised devices could also be co-opted into a botnet for use in DDoS attacks, causing reputational damage and potential legal liabilities.

Remediation Plan

Immediate Action: Identify all affected devices within the environment and immediately apply the latest firmware updates provided by the respective vendors to patch this vulnerability. In parallel, actively monitor for signs of exploitation by reviewing web server and system access logs for any anomalous activity related to the formMapDel endpoint.

Proactive Monitoring: Implement monitoring rules to detect and alert on suspicious requests to the /formMapDel endpoint. Specifically, scrutinize the devicemac parameter for shell metacharacters (e.g., ;, |, &&, $(), `). Monitor for unusual outbound network traffic from affected devices, which could indicate a command-and-control connection. Use an Intrusion Detection/Prevention System (IDS/IPS) with signatures that can identify command injection attempts.

Compensating Controls: If patching cannot be performed immediately, implement the following controls:

• Restrict access to the device's web management interface to a trusted management network or specific IP addresses.
• If possible, disable remote/WAN management access entirely.
• Deploy a Web Application Firewall (WAF) with rules to block malicious requests targeting the vulnerable parameter.
• Ensure the vulnerable devices are on a segmented network to limit the potential impact of a compromise.

Exploitation Status

Public Exploit Available: false

Analyst Notes: As of the published date of August 18, 2025, there are no known public exploits or reports of this vulnerability being actively exploited in the wild. However, command injection vulnerabilities are typically straightforward to exploit once the details are public. Given the critical CVSS score, it is highly likely that a functional exploit will be developed by threat actors.

Analyst Recommendation

Due to the critical severity (CVSS 9.8) and the risk of unauthenticated remote code execution, this vulnerability requires immediate attention. Organizations must prioritize the identification and patching of all affected devices. Although this CVE is not currently on the CISA KEV list, its critical nature warrants treating it with the highest urgency. If patching is delayed for any reason, the compensating controls listed above must be implemented without delay to reduce the attack surface and mitigate the immediate risk of compromise.

Executive Summary:
A critical command injection vulnerability has been identified in multiple TOTOLINK products, rated with a CVSS score of 9.8. This flaw allows an unauthenticated remote attacker to execute arbitrary commands on an affected device, potentially leading to a complete system compromise. Organizations using vulnerable TOTOLINK devices are at high risk of data theft, network disruption, and further infiltration into their internal networks.

Vulnerability Details

CVE-ID: CVE-2025-52053

Affected Software: TOTOLINK Multiple Products

Affected Versions: TOTOLINK X6000R version V9.4.0cu.1360_B20241207 is confirmed vulnerable. See vendor advisory for a complete list of affected products and versions.

Vulnerability: The vulnerability is a command injection flaw within the sub_417D74 function of the device's firmware. An unauthenticated attacker can exploit this by sending a specially crafted request containing malicious shell commands embedded within the file_name parameter. The application fails to properly sanitize this input before passing it to a system command, allowing the attacker's payload to be executed with the privileges of the running process, likely leading to root-level access on the device.

Business Impact

This vulnerability is of critical severity with a CVSS score of 9.8, posing a significant threat to business operations. Successful exploitation could result in a complete compromise of the network device, allowing an attacker to intercept sensitive data, disrupt network availability, or use the device as a pivot point to launch further attacks against the internal network. The potential consequences include data breaches, service outages, reputational damage, and the risk of the compromised device being co-opted into a larger botnet for use in distributed denial-of-service (DDoS) attacks.

Remediation Plan

Immediate Action:

• Apply the vendor-supplied security patches immediately. Update all affected TOTOLINK products to the latest available firmware version.
• Consult the official TOTOLINK security advisory for specific patch details and a comprehensive list of affected models.
• After patching, review system and access logs for any signs of compromise that may have occurred prior to the update.

Proactive Monitoring:

• Monitor network traffic for inbound requests containing shell metacharacters (e.g., ;, |, &&, $(...)) in the file_name parameter or other user-supplied fields.
• Review device logs for unexpected system commands, new process creations, or unauthorized configuration changes.
• Monitor for anomalous outbound connections from TOTOLINK devices, which could indicate communication with an attacker's command-and-control (C2) server.

Compensating Controls:

• If patching is not immediately feasible, restrict access to the device's management interface to a trusted management network only. Do not expose the interface to the internet.
• Implement a Web Application Firewall (WAF) or an Intrusion Prevention System (IPS) with rulesets designed to detect and block command injection attack patterns.
• Ensure network segmentation is in place to limit the lateral movement of an attacker should the device be compromised.

Exploitation Status

Public Exploit Available: False

Analyst Notes: As of Sep 15, 2025, there are no known public proof-of-concept exploits or active exploitation campaigns targeting this vulnerability. However, unauthenticated remote code execution vulnerabilities in network and IoT devices are highly attractive to threat actors for building botnets. It is highly probable that exploits will be developed and utilized in the near future.

Analyst Recommendation

Given the critical CVSS score of 9.8 and the ease of exploitation (unauthenticated, remote), this vulnerability presents a severe and immediate risk. We strongly recommend that organizations identify all vulnerable TOTOLINK devices within their environment and apply the necessary firmware updates as the highest priority. Although this CVE is not currently listed on the CISA KEV catalog, its characteristics make it a prime candidate for future inclusion. Immediate patching and implementation of compensating controls are critical to prevent a potential compromise.

Executive Summary:
A critical vulnerability has been identified in multiple TOTOLINK networking products. This flaw, a buffer overflow, can be exploited by an unauthenticated remote attacker to execute arbitrary code and gain complete control over the affected device, posing a severe risk to network security and integrity.

Vulnerability Details

CVE-ID: CVE-2025-51630

Affected Software: TOTOLINK Multiple Products

Affected Versions: Version N350RT V9.3.5u.6139_B20201216 is confirmed vulnerable. See vendor advisory for a complete list of affected products and versions.

Vulnerability: The vulnerability is a stack-based buffer overflow within the setIpPortFilterRules function, which is part of the device's web management interface. An attacker can send a specially crafted HTTP request containing an overly long string in the ePort parameter. Because the function does not properly validate the input length, the excessive data overwrites adjacent memory on the stack, allowing the attacker to corrupt critical data structures and hijack the program's execution flow to run arbitrary code with the privileges of the device's firmware, typically root.

Business Impact

This vulnerability is rated as critical severity with a CVSS score of 9.8, reflecting the potential for complete system compromise with no user interaction required. Successful exploitation would allow an attacker to take full administrative control of the network device. This could lead to severe consequences, including interception and redirection of network traffic, disabling network access for the organization, using the compromised device as a pivot point to attack other internal systems, or incorporating the device into a botnet for use in larger-scale attacks like Distributed Denial-of-Service (DDoS).

Remediation Plan

Immediate Action: Identify all vulnerable TOTOLINK devices within the environment and update the firmware to the latest version as recommended by the vendor. Prioritize patching for externally-facing or critical network infrastructure devices. After patching, review device logs for any signs of compromise that may have occurred prior to the update.

Proactive Monitoring: Configure network monitoring and firewall logging to detect and alert on exploitation attempts. Specifically, monitor for inbound web requests to the device's management interface that contain unusually long values for the ePort parameter. System administrators should also monitor affected devices for anomalous behavior such as unexpected reboots, high CPU usage, or unusual outbound traffic patterns.

Compensating Controls: If immediate patching is not feasible, implement the following controls to reduce the risk of exploitation:

• Restrict access to the device's web management interface to a secure, trusted network segment.
• Disable remote/WAN management access entirely.
• If available, deploy a Web Application Firewall (WAF) with rules to block requests containing an overly long ePort parameter.

Exploitation Status

Public Exploit Available: False

Analyst Notes: As of Jul 17, 2025, there are no known public proof-of-concept exploits or active exploitation campaigns targeting this vulnerability. The vulnerability is not listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. However, given the critical severity and the straightforward nature of buffer overflow vulnerabilities, it is highly probable that threat actors will develop an exploit in the near future.

Analyst Recommendation

Given the critical CVSS score of 9.8, this vulnerability presents a significant and immediate risk to the organization. We strongly recommend that all affected TOTOLINK devices be patched immediately without delay. Although this vulnerability is not yet listed in the CISA KEV, its severity warrants an emergency patching cycle. If patching cannot be performed immediately, the compensating controls listed above, particularly restricting access to the management interface, must be implemented as a top priority to mitigate the high risk of compromise.

Executive Summary:
A critical command injection vulnerability has been discovered in multiple TOTOLINK products, rated with a CVSS score of 9.8. This flaw allows an unauthenticated attacker to remotely execute arbitrary commands on the affected device by sending a specially crafted request, potentially leading to a complete system compromise. Successful exploitation could result in data theft, network disruption, and the use of the compromised router in further attacks.

Vulnerability Details

CVE-ID: CVE-2025-51390

Affected Software: TOTOLINK Multiple Products

Affected Versions: The specific version TOTOLINK N600R V4.3.0cu.7647_B20210106 is confirmed to be vulnerable. See vendor advisory for a complete list of specific affected products and versions.

Vulnerability: This is a command injection vulnerability within the setWiFiWpsConfig function of the device's firmware. The pin parameter, used for WPS configuration, fails to properly sanitize user-supplied input before passing it to a system shell command. An attacker can craft a request containing malicious shell commands (e.g., 12345678; reboot) within the pin parameter. When the router processes this request, it executes the injected command with the privileges of the system, leading to remote code execution (RCE).

Business Impact

The vulnerability is rated as critical severity with a CVSS score of 9.8, indicating a high risk of compromise with low attack complexity. An attacker who successfully exploits this vulnerability can gain full administrative (root) control over the network device. This level of access could lead to severe consequences, including the interception and theft of all network traffic (e.g., credentials, financial information), redirection of users to malicious websites via DNS hijacking, deployment of malware on the internal network, and using the device as part of a botnet for DDoS attacks. The integrity, confidentiality, and availability of the network are all at significant risk.

Remediation Plan

Immediate Action: The primary remediation is to apply vendor-supplied firmware updates immediately. Organizations should identify all affected TOTOLINK devices and update them to the latest patched version as specified in the vendor's security advisory. After patching, monitor devices for any signs of compromise and review historical access logs for suspicious requests targeting the setWiFiWpsConfig function.

Proactive Monitoring:

• Log Analysis: Scrutinize web server logs on the router for requests to the endpoint associated with the setWiFiWpsConfig function. Look for any pin parameter values containing shell metacharacters such as ;, |, &, $(...), or `.
• Network Traffic Analysis: Monitor for anomalous outbound traffic from the router to unknown or suspicious IP addresses, which could indicate communication with an attacker's command-and-control (C2) server.
• System Behavior: Monitor for unexpected reboots, high CPU utilization, or unfamiliar processes running on the device.

Compensating Controls: If patching cannot be performed immediately, implement the following controls to reduce risk:

• Disable remote (WAN-side) administration of the router.
• Restrict access to the device's web administration interface to a limited set of trusted IP addresses.
• Disable the WPS (Wi-Fi Protected Setup) feature, as the vulnerable function is directly related to it.
• Use a firewall to block unexpected outbound connections originating from the router itself.

Exploitation Status

Public Exploit Available: false

Analyst Notes: As of August 4, 2025, there are no known public exploits or active "in-the-wild" attacks leveraging this vulnerability. However, vulnerabilities in network edge devices like routers are highly attractive targets for threat actors seeking to build botnets or gain initial access to a network. Due to the critical CVSS score and low attack complexity, it is highly probable that a functional exploit will be developed and used by attackers in the near future.

Analyst Recommendation
Given the critical severity (CVSS 9.8) of this vulnerability, we recommend that organizations treat this as a high-priority issue and take immediate action. The primary course of action is to apply the vendor-provided firmware updates across all affected TOTOLINK devices without delay. If patching is not immediately feasible, the compensating controls listed above, particularly disabling remote management and the WPS feature, should be implemented as a temporary measure. Although this CVE is not currently on the CISA KEV list, its critical nature warrants an urgent response to prevent potential device compromise and network intrusion.

Executive Summary:
A critical remote code execution vulnerability has been discovered in multiple TOTOLINK networking products. An unauthenticated remote attacker can exploit this flaw by sending a malicious request to the device's web interface, allowing them to gain complete control, intercept network traffic, and potentially access the internal network. Due to the high severity (CVSS 9.8), immediate patching is required to prevent device compromise.

Vulnerability Details

CVE-ID: CVE-2025-14964

Affected Software: A vulnerability has been found in TOTOLINK Multiple Products

Affected Versions: T10 version 4.1.8cu.5083_B20200521 is confirmed to be affected. See vendor advisory for a complete list of affected products and versions.

Vulnerability: This vulnerability is a stack-based buffer overflow within the web server component of the device's firmware. Specifically, the cstecgi.cgi binary improperly handles the loginAuthUrl argument. A remote attacker can send a crafted HTTP request containing an overly long string in this argument. The sprintf function, which is used to process this input, does not validate the string's length, causing it to write data beyond the allocated buffer on the stack, overwriting critical control data such as the function's return address. This allows an attacker to redirect the program's execution flow to malicious code, resulting in arbitrary code execution on the device with root privileges.

Business Impact

This vulnerability is rated as critical severity with a CVSS score of 9.8. Successful exploitation allows a remote, unauthenticated attacker to achieve Remote Code Execution (RCE) on the affected networking device. The business impact is severe, as a compromised device can lead to a complete loss of confidentiality, integrity, and availability for the network segment it controls. Potential consequences include interception of sensitive data, redirection of users to malicious sites, deployment of malware within the network, using the device as a pivot point for further attacks, or incorporating the device into a botnet for use in DDoS attacks.

Remediation Plan

Immediate Action: The primary remediation is to immediately apply the firmware patches provided by the vendor. Update all affected TOTOLINK devices to the latest available version that addresses this vulnerability. In parallel, system administrators should monitor for exploitation attempts by reviewing web access logs for suspicious requests targeting the /cgi-bin/cstecgi.cgi endpoint.

Proactive Monitoring: Implement enhanced monitoring on network perimeter devices. Security teams should look for GET or POST requests to /cgi-bin/cstecgi.cgi that contain an unusually long or malformed loginAuthUrl parameter. Network Intrusion Detection/Prevention Systems (IDS/IPS) should be updated with the latest signatures to detect and block known exploit patterns for this CVE as they become available.

Compensating Controls: If immediate patching is not feasible, implement the following compensating controls:

• Disable remote/WAN access to the device's web administration interface.
• If remote management is required, ensure it is only accessible via a secure VPN connection to the internal network.
• Utilize a Web Application Firewall (WAF) or reverse proxy to filter malicious requests targeting the vulnerable parameter.
• Segment the network to isolate the device and limit the potential impact of a compromise.

Exploitation Status

Public Exploit Available: false

Analyst Notes: As of Dec 19, 2025, there are no known public proof-of-concept exploits or active exploitation campaigns targeting this vulnerability. However, due to the simplicity of stack-based buffer overflows and the critical impact of this flaw (unauthenticated RCE), it is highly probable that threat actors will develop and deploy exploits in the near future. TOTOLINK devices are frequently targeted by IoT botnets, increasing the likelihood of widespread automated attacks once an exploit becomes public.

Analyst Recommendation

Given the critical CVSS score of 9.8 and the risk of complete device compromise from an unauthenticated remote attacker, this vulnerability poses a significant threat. We strongly recommend that organizations prioritize the immediate patching of all affected TOTOLINK devices. Although this CVE is not currently listed on the CISA KEV catalog, its severity warrants treating it with the highest urgency. Any internet-exposed TOTOLINK devices should be considered at extreme risk and must be patched or have their management interfaces removed from public access without delay.