---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos OS and Junos OS Evolved
AFFECTED_VERSIONS: See enrichment data in Vulnerability Details
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/JSA103142","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T13:56:41.927Z
---END_METADATA---

Description Summary:
A privilege escalation vulnerability in Juniper Networks Junos OS allows local, low-privileged users to execute unauthorized op scripts with root-level permissions, leading to full system compromise.

Executive Summary:
A critical privilege escalation flaw in Juniper Networks Junos OS and Junos OS Evolved allows local attackers to gain root-level access if unsigned Python op scripts are enabled.

Vulnerability Details

CVE-ID: CVE-2026-33793

Affected Software: Juniper Networks Junos OS and Junos OS Evolved

Affected Versions:
Junos OS: All versions before 22.4R3-S7, 23.2 before 23.2R2-S4, 23.4 before 23.4R2-S6, 24.2 before 24.2R1-S2, 24.2R2, 24.4 before 24.4R1-S2, 24.4R2.
Junos OS Evolved: All versions before 22.4R3-S7-EVO, 23.2 before 23.2R2-S4-EVO, 23.4 before 23.4R2-S6-EVO, 24.2 before 24.2R2-EVO, 24.4 before 24.4R1-S1-EVO, 24.4R2-EVO.

Vulnerability: This is an Execution with Unnecessary Privileges (CWE-250) vulnerability. When a configuration allowing unsigned Python op scripts is active, a local, low-privileged user can execute malicious scripts as a root-equivalent user.

Business Impact

A successful exploit results in total system compromise, allowing an attacker to gain full administrative control over the affected networking hardware. Given the CVSS score of 7.8, this represents a high-severity risk to network integrity: an attacker could manipulate routing traffic, intercept data, or disable critical security controls, leading to significant operational disruption and data exfiltration.

Remediation Plan

Immediate Action: Upgrade to the patched releases provided by Juniper Networks: Junos OS 22.4R3-S7, 23.2R2-S4, 23.4R2-S6, 24.2R1-S2, 24.2R2, 24.4R1-S2, 24.4R2, 25.2R1, or Junos OS Evolved 22.4R3-S7-EVO, 23.2R2-S4-EVO, 23.4R2-S6-EVO, 24.2R2-EVO, 24.4R1-S1-EVO, 24.4R2-EVO, 25.2R1-EVO.

Proactive Monitoring: Audit device configurations to identify the presence of unsigned Python op scripts and review system logs for unauthorized script execution or unexpected privilege elevation events.

Compensating Controls: If immediate patching is not feasible, disable the use of unsigned Python op scripts on all affected devices to eliminate the primary attack vector for this privilege escalation.

Exploitation Status

Public Exploit Available: Unknown

Analyst Notes: As of April 11, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The vulnerability requires local access, which limits the immediate attack surface to users already present on the system.

Analyst Recommendation

The risk of total system compromise posed by this vulnerability necessitates immediate attention. Administrators should verify their current Junos OS versions against the affected list and prioritize the deployment of the vendor-supplied patches to close this critical privilege escalation path.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos OS
AFFECTED_VERSIONS: 21.2R3-S10, 21.3, 21.4R3-S12, 22.1, 22.2R3-S8, 22.4, 23.2R2-S6, 23.4R2-S7, 24.2R2-S3, 24.4R2-S3, 25.2R1-S2, 25.2R2
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://kb.juniper.net/JSA107874","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T13:56:41.927Z
---END_METADATA---

Description Summary:
A flaw in the Juniper Networks Junos OS flow daemon allows unauthenticated remote attackers to cause a denial of service via malformed ICMPv6 packets during NAT64 translation.

Executive Summary:
A critical vulnerability in the Juniper Networks Junos OS flow daemon on SRX Series devices allows unauthenticated remote attackers to trigger a persistent denial of service condition.

Vulnerability Details

CVE-ID: CVE-2026-33790

Affected Software: Juniper Networks Junos OS

Affected Versions: All versions prior to the specified fixed releases, including 21.2R3-S10, 21.4R3-S12, 22.4R3-S9, 23.2R2-S6, 23.4R2-S7, 24.2R2-S3, 24.4R2-S3, 25.2R1-S2, and 25.2R2.

Vulnerability: This vulnerability is an improper check for unusual or exceptional conditions (CWE-754) within the flow daemon (flowd), which can be triggered by an unauthenticated attacker sending specifically crafted, malformed ICMPv6 packets. Successful exploitation forces the srxpfe process to crash and restart, and continuous transmission of these packets results in a sustained denial of service.

Business Impact

The exploitation of this vulnerability results in the interruption of network traffic processing for SRX Series devices performing NAT64 translation. Given the CVSS score of 7.5, the impact is significant for environments relying on these gateways for connectivity, as it can lead to total service unavailability for affected segments. Reputational damage and operational downtime are primary risks for organizations that do not apply the necessary patches.

Remediation Plan

Immediate Action: Upgrade Junos OS to one of the resolved software releases provided by Juniper Networks, such as 21.2R3-S10, 21.4R3-S12, 22.4R3-S9, 23.2R2-S6, 23.4R2-S7, 24.2R2-S3, 24.4R2-S3, 25.2R1-S2, or 25.2R2.

Proactive Monitoring: Monitor system logs for frequent srxpfe process crashes or unexpected reboots of the flow daemon, which may indicate exploitation attempts.

Compensating Controls: If immediate patching is not feasible, consider implementing firewall filters to drop suspicious or malformed ICMPv6 packets destined for the device interface to mitigate the attack vector.

Exploitation Status

Public Exploit Available: No — there is no confirmed public exploit in the available data.

Analyst Notes: As of April 11, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw is inherently dangerous due to its ability to be triggered remotely without authentication, which significantly lowers the barrier for potential attackers.

Analyst Recommendation

Organizations utilizing Juniper SRX Series hardware should prioritize this update within their standard maintenance cycle. Because this vulnerability targets a core network process, the risk of service disruption is high for affected deployments. Applying the vendor-supplied patches is the only effective way to neutralize this denial of service risk.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos OS Evolved
AFFECTED_VERSIONS: 21.2R3-S8-EVO, 21.4R3-S7-EVO, 22.2R3-S4-EVO, 22.3R3-S3-EVO, 22.4R3-S2-EVO, 23.2R2-EVO (see advisory for full ranges)
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://kb.juniper.net/JSA107806","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T13:56:41.927Z
---END_METADATA---

Description Summary:
A missing authentication flaw in Juniper Junos OS Evolved on PTX series devices allows local, low privileged users to gain unauthorized high-privileged access to Flexible PIC Concentrators.

Executive Summary:
A missing authentication vulnerability in Juniper Networks Junos OS Evolved allows local attackers to elevate privileges and gain unauthorized access to critical hardware components, creating a risk of full component compromise.

Vulnerability Details

CVE-ID: CVE-2026-33788

Affected Software: Juniper Networks Junos OS Evolved

Affected Versions: 0 to 21.2R3-S8-EVO, 21.4-EVO to 21.4R3-S7-EVO, 22.2-EVO to 22.2R3-S4-EVO, 22.3-EVO to 22.3R3-S3-EVO, 22.4-EVO to 22.4R3-S2-EVO, 23.2-EVO to 23.2R2-EVO

Vulnerability: This is a missing authentication for critical function (CWE-306) flaw. It enables an authenticated local user with low privileges to bypass security controls and interact with Flexible PIC Concentrators as a high-privileged user.

Business Impact

The vulnerability carries a CVSS score of 7.8, reflecting a High severity rating due to the potential for total compromise of the affected hardware component. Successful exploitation allows a malicious actor to gain administrative control over the FPC, which could lead to unauthorized network traffic manipulation, denial of service, or lateral movement within the infrastructure.

Remediation Plan

Immediate Action: Upgrade affected Junos OS Evolved instances to the corrected releases: 21.2R3-S8-EVO, 21.4R3-S7-EVO, 22.2R3-S4-EVO, 22.3R3-S3-EVO, 22.4R3-S2-EVO, 23.2R2-EVO, 23.4R1-EVO, or any subsequent release.

Proactive Monitoring: Review system access logs for unauthorized attempts to access FPC management interfaces or unexpected privilege escalation events involving low-level user accounts.

Compensating Controls: Restrict physical and logical access to the device management plane to only essential personnel to limit the exposure to potential local attackers.

Exploitation Status

Public Exploit Available: Unknown

Analyst Notes: As of April 11, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw requires an existing local authenticated session, which serves as a significant barrier for remote attackers.

Analyst Recommendation

Given the potential for full compromise of the affected Flexible PIC Concentrators, organizations operating PTX series hardware should prioritize patching during the next maintenance window. Apply the recommended firmware updates provided by Juniper Networks to eliminate the vulnerability and ensure the integrity of the device management plane.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos OS
AFFECTED_VERSIONS: Junos OS 24.4 up to 24.4R2-S3, 25.2 up to 25.2R2
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://kb.juniper.net/JSA107872","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T13:56:41.927Z
---END_METADATA---

Description Summary:
A missing authorization vulnerability in the Juniper Networks Junos OS CLI allows local, low-privileged authenticated users to execute commands leading to full device compromise.

Executive Summary:
A missing authorization flaw in the Juniper Networks Junos OS CLI on MX Series platforms allows low-privileged users to achieve full device compromise, posing a critical security risk.

Vulnerability Details

CVE-ID: CVE-2026-33785

Affected Software: Juniper Networks Junos OS

Affected Versions: Junos OS 24.4 up to 24.4R2-S3, 25.2 up to 25.2R2

Vulnerability: This vulnerability involves a missing authorization check in the CLI, which allows any authenticated user, regardless of privilege level, to execute unauthorized operational commands intended for high-privileged administrators or device management functions.

Business Impact

Successful exploitation grants a low-privileged user the ability to perform administrative actions that impact all aspects of devices managed via the MX Series, leading to a complete compromise of the device. Given the CVSS score of 8.8, this vulnerability represents a high-severity risk that could result in unauthorized configuration changes, data interception, or total loss of control over critical network infrastructure.

Remediation Plan

Immediate Action: Upgrade to Junos OS version 24.4R2-S3, 25.2R2, 25.4R1, or any subsequent release to apply the necessary authorization patches.

Proactive Monitoring: Audit command history logs for unauthorized usage of administrative operational commands, specifically looking for attempts to execute CSDS or JDM management functions by non-administrative accounts.

Compensating Controls: Restrict physical and logical access to the CLI to only trusted personnel and enforce strict role-based access control policies to minimize the exposure of low-privileged accounts.

Exploitation Status

Public Exploit Available: No

Analyst Notes: As of April 11, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw is inherently dangerous due to the potential for privilege escalation and full system control, though it requires existing authenticated access to the local CLI.

Analyst Recommendation

The severity of this vulnerability necessitates immediate attention to prevent unauthorized administrative control over network hardware. Administrators must prioritize the deployment of the provided vendor patches to ensure that authorization checks are properly enforced, thereby neutralizing the risk posed by low-privileged users within the environment.

---METADATA---
VENDOR: Juniper
PRODUCT: Support Insights (JSI) Virtual Lightweight Collector (vLWC)
AFFECTED_VERSIONS: All versions before 3.0.94
CONFIDENCE: high
MISSING: none
---END_METADATA---

Description Summary:
Juniper Networks vLWC ships with a default password for a high-privileged account that is not enforced to be changed, allowing unauthenticated remote access.

Executive Summary:
A default password vulnerability in Juniper vLWC allows unauthenticated attackers to gain full administrative control over the appliance.

Vulnerability Details

CVE-ID: CVE-2026-33784

Affected Software: Juniper Networks Support Insights (JSI) Virtual Lightweight Collector (vLWC)

Affected Versions: All versions before 3.0.94

Vulnerability: The vLWC software utilizes a hardcoded or default password for a highly privileged account. Because the system does not mandate a password change during the initial provisioning process, unauthenticated network-based attackers can gain full control of the device.

Business Impact

With a CVSS score of 9.8, this vulnerability represents an extreme security risk. A successful exploit grants the attacker total control over the appliance, which can be used as a pivot point for further lateral movement within the network or to intercept and manipulate management traffic.

Remediation Plan

Immediate Action: Upgrade the vLWC software to version 3.0.94 or later immediately to enforce secure password policies.

Proactive Monitoring: Monitor for unauthorized login attempts and unusual administrative activity originating from unknown or unauthorized IP addresses.

Compensating Controls: Isolate the vLWC management interface within a restricted network segment (VLAN) and ensure access is limited to trusted administrators via VPN or jump hosts.

Exploitation Status

Public Exploit Available: No

Analyst Notes: As of Apr 9, 2026, there is no public information indicating active exploitation of this vulnerability. However, due to the nature of the flaw, the potential for exploitation is high.

Analyst Recommendation

Given the critical nature of this vulnerability and the ease of unauthorized access, immediate action is required. Administrators must update the affected software and ensure that all administrative passwords are changed from their default state.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos OS
AFFECTED_VERSIONS: 0 up to 22.4R3-S9, 23.2 up to 23.2R2-S6, 23.4 up to 23.4R2-S7, 24.2 up to 24.2R2-S4, 24.4 up to 24.4R2-S3, 25.2 up to 25.2R1-S2, 25.2R2
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://kb.juniper.net/JSA107868","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T13:56:41.927Z
---END_METADATA---

Description Summary:
A malformed ISAKMP packet allows an unauthenticated, network-based attacker to trigger a crash in the kmd or iked processes on Juniper Junos OS, resulting in a complete Denial-of-Service for VPNs.

Executive Summary:
An unauthenticated remote Denial-of-Service vulnerability in Juniper Networks Junos OS allows attackers to disrupt VPN services by sending a specifically malformed ISAKMP packet.

Vulnerability Details

CVE-ID: CVE-2026-33778

Affected Software: Juniper Networks Junos OS

Affected Versions: 0 up to 22.4R3-S9, 23.2 up to 23.2R2-S6, 23.4 up to 23.4R2-S7, 24.2 up to 24.2R2-S4, 24.4 up to 24.4R2-S3, 25.2 up to 25.2R1-S2, 25.2R2

Vulnerability: This vulnerability involves improper validation of input within the IPsec library used by the kmd and iked processes. An unauthenticated attacker can crash these processes remotely, preventing the establishment of new security associations and causing a complete service outage.

Business Impact

Successful exploitation poses a significant risk to business continuity by disabling VPN connectivity for remote workers and branch offices. While the CVSS score of 7.5 reflects a high severity, the impact is primarily availability-based, meaning organizations may suffer from total loss of secure network access until the affected processes are recovered.

Remediation Plan

Immediate Action: Upgrade to the patched releases provided by Juniper Networks, specifically 22.4R3-S9, 23.2R2-S6, 23.4R2-S7, 24.2R2-S4, 24.4R2-S3, 25.2R1-S2, or 25.4R1 and subsequent versions.

Proactive Monitoring: Monitor system logs for repeated process restarts of kmd or iked, which may indicate active exploitation attempts targeting the IPsec stack.

Compensating Controls: Implement access control lists at the network perimeter to restrict ISAKMP traffic to known and trusted IP addresses, effectively limiting the attack surface for unauthorized actors.

Exploitation Status

Public Exploit Available: No

Analyst Notes: As of April 11, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw is highly accessible due to the unauthenticated nature of the attack vector, making it a priority for organizations relying on these devices for secure connectivity.

Analyst Recommendation

Given the potential for complete service disruption, organizations should prioritize the deployment of the vendor-supplied patches across all affected SRX and MX series hardware. Administrators should test the updates in a staging environment if possible, but the absence of authentication requirements makes this a high-priority update for all perimeter-facing infrastructure.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos OS (SRX Series)
AFFECTED_VERSIONS: 23.4 before 23.4R2-S5, 24.2 before 24.2R2-S1, 24.4 before 24.4R2
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/JSA106020","name":null,"tags":["vendor-advisory"]},{"url":"https://kb.juniper.net/JSA106020","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T19:15:04.722Z
---END_METADATA---

Description Summary:
An unchecked return value in the DNS module of Juniper Junos OS on SRX Series devices allows an unauthenticated, network-based attacker to trigger a crash and service interruption.

Executive Summary:
A critical vulnerability in the Juniper Networks SRX Series DNS module allows an unauthenticated attacker to cause a denial-of-service condition through specifically formatted network requests.

Vulnerability Details

CVE-ID: CVE-2026-21920

Affected Software: Juniper Networks Junos OS (SRX Series)

Affected Versions: 23.4 versions before 23.4R2-S5, 24.2 versions before 24.2R2-S1, 24.4 versions before 24.4R2

Vulnerability: The flaw is an Unchecked Return Value (CWE-252) within the DNS processing module, which can be triggered by an unauthenticated attacker sending a specifically crafted DNS request to the device. This causes the flowd process to crash and restart, leading to an immediate denial of service.

Business Impact

Successful exploitation of this vulnerability results in the disruption of network traffic and security services managed by the SRX device. Given the CVSS score of 7.5, this high-severity flaw poses a significant risk to network availability and operational continuity. Prolonged service interruptions could impact critical business communications and connectivity, requiring prompt attention to restore system stability.

Remediation Plan

Immediate Action: Upgrade to the patched software releases, specifically 23.4R2-S5, 24.2R2-S1, 24.4R2, 24.4R2-S1, 25.2R1, or any subsequent release.

Proactive Monitoring: Review system logs for frequent crashes or unexpected restarts of the flowd process, which may indicate attempted exploitation.

Compensating Controls: If patching is delayed, restrict access to the DNS processing functions of the device to trusted management networks using firewall filters to mitigate exposure to malicious requests.

Exploitation Status

Public Exploit Available: Unknown

Analyst Notes: As of January 16, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw is inherently exploitable by any network-adjacent attacker capable of sending traffic to the device DNS interface.

Analyst Recommendation

The risk of service disruption on critical network infrastructure necessitates immediate prioritization of this patch. Security teams should identify all affected SRX Series devices and schedule maintenance windows to apply the vendor-supplied updates as soon as possible to prevent potential denial-of-service attacks.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos OS
AFFECTED_VERSIONS: 0 up to 22.4R3-S7, 23.2 up to 23.2R2-S3, 23.4 up to 23.4R2-S4, 24.2 up to 24.2R2
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/JSA106018","name":null,"tags":["vendor-advisory"]},{"url":"https://kb.juniper.net/JSA106018","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T14:11:37.166Z
---END_METADATA---

Description Summary:
A double free vulnerability in the flow processing daemon of Juniper Junos OS allows unauthenticated network attackers to cause a denial of service via a specific sequence of TCP packets.

Executive Summary:
A critical denial of service vulnerability in Juniper Networks Junos OS allows unauthenticated attackers to crash the flow processing daemon and restart the Flexible PIC Concentrator.

Vulnerability Details

CVE-ID: CVE-2026-21918

Affected Software: Juniper Networks Junos OS

Affected Versions: 0 up to 22.4R3-S7, 23.2 up to 23.2R2-S3, 23.4 up to 23.4R2-S4, 24.2 up to 24.2R2

Vulnerability: This is a double free vulnerability (CWE-415) triggered within the flowd daemon during TCP session establishment. An unauthenticated, network-based attacker can exploit this by sending a specific sequence of packets to SRX or MX Series devices.

Business Impact

The successful exploitation of this vulnerability results in a denial of service, causing the flowd daemon to crash and forcing the affected Flexible PIC Concentrator (FPC) to restart. With a CVSS score of 7.5, this high-severity flaw poses a significant risk to network availability and operational continuity. Organizations relying on SRX and MX Series hardware for perimeter security or core routing face potential service outages if this vulnerability is triggered.

Remediation Plan

Immediate Action: Upgrade Junos OS on affected SRX and MX Series devices to version 22.4R3-S7, 23.2R2-S3, 23.4R2-S4, 24.2R2, 24.4R1, or any subsequent release.

Proactive Monitoring: Monitor system logs for repeated FPC crashes or unexpected daemon restarts that may indicate attempted exploitation.

Compensating Controls: Implement infrastructure access control lists to restrict traffic to the management plane and verify that ingress traffic is strictly filtered to authorized sources where possible.

Exploitation Status

Public Exploit Available: Unknown

Analyst Notes: As of January 17, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw is inherently dangerous due to its ability to be triggered by an unauthenticated attacker sending crafted TCP packets over the network.

Analyst Recommendation

Given the potential for service disruption on critical networking infrastructure, administrators should prioritize the deployment of the provided vendor patches. Ensure that all SRX and MX Series devices are updated to the specified secure versions to eliminate the risk of remote denial of service attacks.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos OS
AFFECTED_VERSIONS: 23.2R2-S2 up to 23.2R2-S5, 23.4R2-S1 up to 23.4R2-S5, 24.2 before 24.2R2-S2, 24.4 before 24.4R1-S3, 24.4R2
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/JSA105996","name":null,"tags":["vendor-advisory"]},{"url":"https://kb.juniper.net/JSA105996","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T14:11:37.166Z
---END_METADATA---

Description Summary:
A malformed SSL packet can trigger a crash in the Web-Filtering module of Juniper Networks Junos OS on SRX Series devices, leading to an unauthenticated denial-of-service condition.

Executive Summary:
A critical denial-of-service vulnerability in Juniper Networks Junos OS allows unauthenticated network attackers to crash SRX Series devices via malformed SSL traffic.

Vulnerability Details

CVE-ID: CVE-2026-21917

Affected Software: Juniper Networks Junos OS

Affected Versions: 23.2R2-S2 up to 23.2R2-S5, 23.4R2-S1 up to 23.4R2-S5, 24.2 before 24.2R2-S2, 24.4 before 24.4R1-S3, 24.4R2

Vulnerability: This flaw involves improper validation of input syntactic correctness within the Web-Filtering module. An unauthenticated attacker can send a specifically malformed SSL packet to an SRX device configured for UTM Web-Filtering, causing an FPC crash and subsequent device restart.

Business Impact

Successful exploitation of this vulnerability results in a denial-of-service, which can disrupt critical network traffic and security services provided by SRX gateways. Given the CVSS score of 7.5, this high-severity issue poses a significant risk to operational continuity, as an attacker can repeatedly force device reboots to maintain an offline state for internal network segments.

Remediation Plan

Immediate Action: Upgrade Junos OS to the patched releases: 23.2R2-S5, 23.4R2-S5, 24.2R2-S2, 24.4R1-S3, 24.4R2, 25.2R1, or any subsequent version.

Proactive Monitoring: Monitor system logs for frequent FPC (Flexible PIC Concentrator) crashes, unexpected device restarts, or spikes in malformed traffic patterns targeting the security gateway.

Compensating Controls: If immediate patching is not feasible, consider disabling the affected Web-Filtering feature if it is not critical to operations, or utilize upstream ACLs to restrict traffic reaching the SRX management and traffic-processing interfaces.

Exploitation Status

Public Exploit Available: Unknown

Analyst Notes: As of January 17, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw is inherently exploitable by any network-adjacent attacker capable of sending traffic to the device's web-filtering process.

Analyst Recommendation

The risk of service disruption to SRX Series firewalls necessitates prompt attention. Administrators should prioritize the deployment of the provided vendor security updates to eliminate the underlying vulnerability and prevent potential service outages caused by malicious SSL traffic.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos OS (SRX Series)
AFFECTED_VERSIONS: 22.4R3-S8 (exclusive), 23.2R2-S5 (exclusive), 23.4R2-S6 (exclusive), 24.2R2-S3 (exclusive), 24.4R2-S2 (exclusive), 25.2R1-S1 (exclusive), 25.2R2
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/JSA106015","name":null,"tags":["vendor-advisory"]},{"url":"https://kb.juniper.net/JSA106015","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T14:11:37.166Z
---END_METADATA---

Description Summary:
An improper locking flaw in the GTP plugin of Juniper Junos OS on SRX Series devices allows unauthenticated network attackers to cause a device crash and denial of service via malformed packets.

Executive Summary:
A critical denial of service vulnerability in Juniper Networks SRX Series firewalls allows unauthenticated remote attackers to trigger a device crash and complete traffic outage.

Vulnerability Details

CVE-ID: CVE-2026-21914

Affected Software: Juniper Networks Junos OS on SRX Series

Affected Versions: All versions prior to 22.4R3-S8, 23.2R2-S5, 23.4R2-S6, 24.2R2-S3, 24.4R2-S2, 25.2R1-S1, and 25.2R2.

Vulnerability: This issue is caused by improper locking within the GPRS Tunnelling Protocol (GTP) plugin, which fails to release a lock when processing a malformed Modify Bearer Request message. This unauthenticated remote exploit forces other threads to hang, ultimately triggering a watchdog timeout that results in an FPC crash and service interruption.

Business Impact

The vulnerability carries a CVSS score of 7.5, reflecting a high potential for operational disruption. Because the exploit can be triggered by an unauthenticated network attacker, it poses a significant risk to perimeter security and network availability. A successful attack will force a device restart, leading to a complete traffic outage and potential loss of connectivity for all downstream services protected by the SRX appliance.

Remediation Plan

Immediate Action: Upgrade to the patched versions as specified in the Juniper security advisory, specifically releases 22.4R3-S8, 23.2R2-S5, 23.4R2-S6, 24.2R2-S3, 24.4R2-S2, 25.2R1-S1, 25.2R2, or 25.4R1 and later.

Proactive Monitoring: Monitor system logs for repeated FPC crashes or unexpected watchdog timeouts that correlate with incoming traffic patterns.

Compensating Controls: If immediate patching is not possible, implement firewall filters at the network edge to drop unexpected or malformed GTP traffic directed toward the SRX control plane.

Exploitation Status

Public Exploit Available: No

Analyst Notes: As of January 17, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. While the flaw is theoretically simple to trigger, the absence of public exploit code reduces immediate tactical risk; however, the impact on network availability remains severe.

Analyst Recommendation

Given that this vulnerability allows for unauthenticated remote denial of service on critical network infrastructure, organizations should prioritize the deployment of the provided firmware updates. Ensure that all SRX Series devices are audited against the affected version list and that patch management schedules are accelerated to mitigate the risk of unplanned outages.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos OS (EX4000 series)
AFFECTED_VERSIONS: 24.4 before 24.4R2, 25.2 before 25.2R1-S2, 25.2R2
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/JSA106014","name":null,"tags":["vendor-advisory"]},{"url":"https://kb.juniper.net/JSA106014","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T14:11:37.166Z
---END_METADATA---

Description Summary:
An incorrect initialization of resources in Juniper Networks Junos OS on EX4000 models allows an unauthenticated network attacker to trigger a device crash and denial of service.

Executive Summary:
A high-severity denial of service vulnerability exists in Juniper Networks Junos OS on EX4000 series switches that can be triggered by unauthenticated network traffic.

Vulnerability Details

CVE-ID: CVE-2026-21913

Affected Software: Juniper Networks Junos OS

Affected Versions: 24.4 versions before 24.4R2, 25.2 versions before 25.2R1-S2, and 25.2R2

Vulnerability: This vulnerability involves incorrect resource initialization within the Internal Device Manager, which leads to an FXPC crash and system restart when the device is subjected to a high volume of traffic. The flaw is remotely exploitable by an unauthenticated, network-based attacker.

Business Impact

The exploitation of this vulnerability results in a complete service outage for the affected EX4000-48T, EX4000-48P, and EX4000-48MP switch models until the hardware automatically completes a restart. With a CVSS score of 7.5, this high-severity flaw poses a significant risk to network availability and business continuity. Organizations relying on these switches for core connectivity may face operational downtime that disrupts mission-critical services.

Remediation Plan

Immediate Action: Upgrade Junos OS to version 24.4R2, 25.2R1-S2, 25.2R2, 25.4R1, or any subsequent release as recommended by the vendor.

Proactive Monitoring: Monitor device logs for the error message "reason=0x4000002" or "watchdog + panic with core dump" via the "show chassis routing-engine" command to identify potential crash events.

Compensating Controls: Implement ingress rate limiting or traffic shaping on network interfaces to mitigate the impact of high-volume traffic spikes that trigger the underlying resource exhaustion.

Exploitation Status

Public Exploit Available: No

Analyst Notes: As of January 17, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The vulnerability is inherently dangerous because it is automatable and requires no authentication to trigger a system-wide crash.

Analyst Recommendation

Given the potential for complete network disruption, administrators must prioritize the deployment of the provided firmware updates across all affected EX4000 series switches. Failure to patch these devices leaves the network infrastructure vulnerable to simple, high-volume traffic attacks that can be executed by unauthenticated remote actors.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos OS
AFFECTED_VERSIONS: 21.4R3-S12, 22.4R3-S8, 23.2R2-S5, 23.4R2-S5, 24.2R2-S3, 24.4R2-S1, 25.2R1-S1, 25.2R2 (and all prior versions in those tracks)
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/JSA106005","name":null,"tags":["vendor-advisory"]},{"url":"https://www.juniper.net/documentation/us/en/software/junos/vpn-ipsec/topics/topic-map/security-powermode-ipsec-vpn.html","name":null,"tags":["technical-description"]},{"url":"https://kb.juniper.net/JSA106005","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T14:11:37.166Z
---END_METADATA---

Description Summary:
An improper handling of exceptional conditions in the Junos OS packet forwarding engine allows unauthenticated attackers to cause a device crash and traffic loss via specific ICMP packets.

Executive Summary:
A critical vulnerability in Juniper Networks Junos OS on SRX Series devices allows unauthenticated remote attackers to trigger a system crash and denial of service.

Vulnerability Details

CVE-ID: CVE-2026-21906

Affected Software: Juniper Networks Junos OS

Affected Versions: All versions before 21.4R3-S12, 22.4 before 22.4R3-S8, 23.2 before 23.2R2-S5, 23.4 before 23.4R2-S5, 24.2 before 24.2R2-S3, 24.4 before 24.4R2-S1, and 25.2 before 25.2R1-S1 or 25.2R2.

Vulnerability: The flaw exists in the packet forwarding engine (PFE) when PowerMode IPsec (PMI) and GRE performance acceleration are enabled. An unauthenticated network-based attacker can send a specific ICMP packet through a GRE tunnel, triggering an exception that forces the PFE to crash and restart, resulting in immediate traffic loss.

Business Impact

Successful exploitation of this vulnerability results in a denial of service for the affected SRX Series gateway. Given that the PFE handles all transit traffic, a crash will interrupt all network communications passing through the device, leading to significant operational downtime. With a CVSS score of 7.5, this high-severity issue poses a substantial risk to network availability and business continuity for organizations relying on these devices for secure connectivity.

Remediation Plan

Immediate Action: Upgrade Junos OS to the patched release versions: 21.4R3-S12, 22.4R3-S8, 23.2R2-S5, 23.4R2-S5, 24.2R2-S3, 24.4R2-S1, 25.2R1-S1, 25.2R2, or any subsequent release.

Proactive Monitoring: Monitor device logs for unexpected PFE crashes or restart events and utilize the command "show security flow pmi statistics" to audit the status of PowerMode IPsec configurations.

Compensating Controls: If patching is not immediately feasible, consider disabling PowerMode IPsec (PMI) or GRE performance acceleration if they are not strictly required for your specific operational environment.

Exploitation Status

Public Exploit Available: Unknown

Analyst Notes: As of January 17, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw is considered inherently exploitable as it only requires sending a specifically crafted network packet to the target interface.

Analyst Recommendation

This vulnerability represents a significant risk to the stability of Juniper SRX security gateways. Because the attack vector is unauthenticated and targets the core packet forwarding functionality, organizations must prioritize patching these systems during the next maintenance window. Apply the provided vendor updates immediately to ensure the PFE remains resilient against this denial of service attack.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos OS
AFFECTED_VERSIONS: 21.2R3-S10, 21.4R3-S12, 22.4R3-S8, 23.2R2-S5, 23.4R2-S6, 24.2R2-S3, 24.4R2-S1, 25.2R1-S1, 25.2R2
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/JSA106004","name":null,"tags":["vendor-advisory"]},{"url":"https://kb.juniper.net/JSA106004","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T19:15:04.722Z
---END_METADATA---

Description Summary:
A loop with unreachable exit condition in the SIP ALG of Juniper Junos OS allows an unauthenticated attacker to cause a denial of service by sending specific SIP messages over TCP.

Executive Summary:
An unauthenticated remote attacker can trigger a denial of service condition in Juniper Networks Junos OS by sending malformed SIP messages over TCP.

Vulnerability Details

CVE-ID: CVE-2026-21905

Affected Software: Juniper Networks Junos OS

Affected Versions: All versions before 21.2R3-S10, 21.4R3-S12, 22.4R3-S8, 23.2R2-S5, 23.4R2-S6, 24.2R2-S3, 24.4R2-S1, 25.2R1-S1, and 25.2R2.

Vulnerability: The vulnerability exists in the SIP application layer gateway (ALG) where improper parsing of SIP headers over TCP leads to an infinite loop. This state exhausts system resources and triggers a watchdog timer expiration, causing the flowd or mspmand processes to crash.

Business Impact

The exploitation of this vulnerability results in a denial of service, which can cause significant network disruption for organizations relying on SRX and MX Series hardware. With a CVSS score of 7.5, the risk is classified as High, reflecting the potential for complete loss of service availability for critical network segments without requiring any user authentication or interaction.

Remediation Plan

Immediate Action: Upgrade to the patched Junos OS releases identified in the vendor advisory (e.g., 21.2R3-S10, 21.4R3-S12, 22.4R3-S8, 23.2R2-S5, 23.4R2-S6, 24.2R2-S3, 24.4R2-S1, 25.2R1-S1, or 25.2R2) immediately.

Proactive Monitoring: Monitor device logs for recurring process crashes, specifically targeting the flowd or mspmand processes, and investigate unexpected spikes in TCP-based SIP traffic.

Compensating Controls: If patching is not immediately feasible, restrict access to the SIP ALG interface or implement firewall filters to block unauthorized SIP traffic from untrusted sources, noting that this issue specifically affects traffic sent over TCP.

Exploitation Status

Public Exploit Available: Unknown

Analyst Notes: As of January 17, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw is inherently dangerous due to its ability to be triggered remotely by unauthenticated attackers, but the requirement for specific SIP messages over TCP provides a measurable surface for monitoring and defensive filtering.

Analyst Recommendation

Given the critical nature of core network infrastructure, organizations should prioritize the deployment of the provided patches to ensure service continuity. The lack of authentication required to trigger this crash makes it an attractive target for network-based disruption, and immediate patching is the only definitive method to eliminate this risk.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos OS and Junos OS Evolved
AFFECTED_VERSIONS: Junos OS: 23.4R2-S3 up to 23.4R2-S5, 24.2R2 up to 24.2R2-S1, 24.4R1 up to 24.4R1-S3, 24.4R2; Junos OS Evolved: 23.4R2-S2-EVO up to 23.4R2-S5-EVO, 24.2R2-EVO up to 24.2R2-S1-EVO, 24.4R1-EVO up to 24.4R1-S3-EVO, 24.4R2-EVO
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/JSA103165","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T19:15:07.706Z
---END_METADATA---

Description Summary:
A vulnerability in the routing protocol daemon of Juniper Junos OS allows an unauthenticated, network-based attacker to trigger a crash and restart via a specific BGP EVPN update message.

Executive Summary:
A critical vulnerability in the Juniper Networks routing protocol daemon allows unauthenticated remote attackers to cause a denial of service on affected network infrastructure.

Vulnerability Details

CVE-ID: CVE-2025-60004

Affected Software: Juniper Networks Junos OS and Junos OS Evolved

Affected Versions: See metadata for specific range listings.

Vulnerability: The flaw resides in the routing protocol daemon (rpd), where improper handling of BGP EVPN update messages causes the daemon to crash. This can be triggered by an unauthenticated attacker sending a crafted BGP message over an established BGP session.

Business Impact

The ability for an unauthenticated attacker to remotely crash the routing daemon represents a significant risk to network availability. A successful exploitation results in a Denial of Service (DoS) state, potentially disrupting critical traffic flows and requiring manual intervention to restore services. With a CVSS score of 7.5, this high-severity vulnerability poses a substantial threat to business continuity for organizations relying on Juniper routing hardware.

Remediation Plan

Immediate Action: Upgrade all affected Junos OS and Junos OS Evolved devices to the recommended software releases provided by Juniper Networks in their security advisory.

Proactive Monitoring: Monitor network logs for unusual BGP session activity or frequent rpd process restarts that may indicate attempted exploitation.

Compensating Controls: If patching is not immediately feasible, restrict BGP peering access to trusted, authorized IP addresses via firewall rules to minimize the attack surface.

Exploitation Status

Public Exploit Available: No

Analyst Notes: As of October 10, 2025, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw is inherently dangerous due to its potential to disrupt core network routing processes without requiring any prior authentication.

Analyst Recommendation

The risk posed by CVE-2025-60004 is significant given the central role of the routing protocol daemon in Juniper network devices. Security teams should prioritize patching cycles for all affected infrastructure to eliminate the possibility of a network-wide service outage. Ensure that all updates are applied in accordance with vendor guidance to maintain system stability and security.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos OS and Junos OS Evolved
AFFECTED_VERSIONS: Junos OS: <22.4R3-S8, <23.2R2-S5, <23.4R2-S6, <24.2R2-S2, <24.4R2; Junos OS Evolved: <22.4R3-S8-EVO, <23.2R2-S5-EVO, <23.4R2-S6-EVO, <24.2R2-S2-EVO, <24.4R2-EVO
CONFIDENCE: high
MISSING: none
CREDITS: Juniper SIRT would like to acknowledge and thank Craig Dods from Meta’s Infrastructure Security Engineering team for res (finder)
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/","name":null,"tags":["vendor-advisory"]},{"url":"https://kb.juniper.net/JSA103166","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T14:11:37.182Z
---END_METADATA---

Description Summary:
A buffer over-read vulnerability in the routing protocol daemon of Juniper Networks Junos OS and Junos OS Evolved allows an unauthenticated network attacker to cause a denial of service.

Executive Summary:
An unauthenticated remote attacker can trigger a crash and restart of the routing protocol daemon in Juniper Networks Junos OS and Junos OS Evolved by sending specific BGP updates, causing a Denial of Service.

Vulnerability Details

CVE-ID: CVE-2025-60003

Affected Software: Juniper Networks Junos OS and Junos OS Evolved

Affected Versions: Junos OS: <22.4R3-S8, <23.2R2-S5, <23.4R2-S6, <24.2R2-S2, <24.4R2; Junos OS Evolved: <22.4R3-S8-EVO, <23.2R2-S5-EVO, <23.4R2-S6-EVO, <24.2R2-S2-EVO, <24.4R2-EVO

Vulnerability: This vulnerability is a buffer over-read (CWE-126) located in the routing protocol daemon (rpd). It is triggered when an unauthenticated attacker sends a BGP update containing specific optional transitive attributes to a device, provided the session involves a non-4-byte-AS capable peer.

Business Impact

The exploitation of this vulnerability results in a critical Denial of Service (DoS) condition, as the routing protocol daemon will crash and restart upon receiving malicious BGP traffic. This leads to the disruption of network routing services, potentially causing significant downtime for connected infrastructure. With a CVSS score of 7.5, this issue presents a high risk to operational continuity, especially for core network appliances.

Remediation Plan

Immediate Action: Upgrade to the patched software releases provided by Juniper Networks, specifically 22.4R3-S8, 23.2R2-S5, 23.4R2-S6, 24.2R2-S2, 24.4R2, 25.2R1, or their corresponding Evolved versions.

Proactive Monitoring: Monitor system logs for repeated rpd process crashes and review BGP peering sessions to identify peers that are not 4-byte-AS capable.

Compensating Controls: If patching is not immediately feasible, verify if the 4-byte-AS capability can be managed or restricted for untrusted peering sessions to mitigate the attack vector.

Exploitation Status

Public Exploit Available: No — exploit_available (false).

Analyst Notes: As of January 17, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw is inherently dangerous due to its potential to disrupt global routing tables without requiring authentication.

Analyst Recommendation

Given the potential for widespread network instability, organizations should prioritize the deployment of the vendor-supplied patches across all affected Juniper network infrastructure. Regular maintenance cycles should be accelerated to address this vulnerability, as the lack of authentication requirements makes it an attractive target for network-based attackers.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos Space
AFFECTED_VERSIONS: 0 up to (excluding) 24.1R4
CONFIDENCE: high
MISSING: none
CREDITS: Juniper SIRT would like to acknowledge and thank Arnoldas Radisauskas and Jorge Escabias from NATO Cyber Security Center (finder)
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/JSA103140","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T19:15:06.698Z
---END_METADATA---

Description Summary:
A stored cross-site scripting vulnerability in Juniper Networks Junos Space allows authenticated attackers with low privileges to execute commands with administrative permissions.

Executive Summary:
A critical stored cross-site scripting vulnerability in Juniper Networks Junos Space allows authenticated attackers to escalate privileges and execute commands with administrative authority.

Vulnerability Details

CVE-ID: CVE-2025-59978

Affected Software: Juniper Networks Junos Space

Affected Versions: 0 up to (excluding) 24.1R4

Vulnerability: The flaw is a stored cross-site scripting (XSS) vulnerability (CWE-79) that allows an attacker to inject malicious script tags into web pages. When viewed by a target user, these scripts execute within the context of the user session, enabling command execution with administrative permissions.

Business Impact

This vulnerability carries a CVSS score of 9.0, indicating a critical severity level due to the potential for complete administrative compromise. Successful exploitation allows an attacker to manipulate system functions and gain unauthorized control over the Junos Space platform, posing a significant risk to organizational infrastructure and data integrity.

Remediation Plan

Immediate Action: Upgrade Juniper Networks Junos Space to version 24.1R4 or any subsequent release as recommended by the vendor.

Proactive Monitoring: Monitor system logs for unusual administrative activity or unauthorized script execution patterns within the Junos Space web interface.

Compensating Controls: Implement a strict Web Application Firewall (WAF) policy to filter malicious script injections and restrict administrative access to trusted management networks.

Exploitation Status

Public Exploit Available: No (exploit_available: unknown)

Analyst Notes: As of October 9, 2025, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. While the vulnerability requires low privileges (authenticated), the high impact of administrative command execution necessitates immediate patching.

Analyst Recommendation

The risk posed by this vulnerability is severe, as it permits privilege escalation through malicious input injection. Organizations utilizing Juniper Networks Junos Space should prioritize the transition to version 24.1R4 to eliminate the underlying vulnerability and prevent potential administrative account takeover.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos Space
AFFECTED_VERSIONS: 0 up to 22.2R1 Patch V3, 23.1 up to 23.1R1 Patch V3
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/JSA103172","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T19:15:07.706Z
---END_METADATA---

Description Summary:
An uncontrolled resource consumption flaw in the Juniper Junos Space HTTP daemon allows unauthenticated attackers to cause a denial of service via API call flooding.

Executive Summary:
A critical denial of service vulnerability in Juniper Networks Junos Space allows unauthenticated attackers to crash the management interface by exhausting system resources.

Vulnerability Details

CVE-ID: CVE-2025-59975

Affected Software: Juniper Networks Junos Space

Affected Versions: 0 up to 22.2R1 Patch V3, 23.1 up to 23.1R1 Patch V3

Vulnerability: This vulnerability, classified as CWE-400 (Uncontrolled Resource Consumption), occurs within the HTTP daemon. An unauthenticated attacker can flood the system with API requests, consuming all available file handles and rendering the management interface (SSH and WebUI) inaccessible.

Business Impact

Successful exploitation of this vulnerability results in a complete loss of management access to the affected Junos Space appliance. Given the CVSS score of 7.5, this high-severity flaw poses a significant operational risk, as a manual system reboot is required to restore functionality, leading to potential service downtime and administrative disruption.

Remediation Plan

Immediate Action: Upgrade to Junos Space 22.2R1 Patch V3, 23.1R1 Patch V3, 24.1R1, or any subsequent release provided by the vendor.

Proactive Monitoring: Monitor management interface traffic for abnormal spikes in API connection requests and review system logs for recurring resource exhaustion errors.

Compensating Controls: Deploy a Web Application Firewall or rate-limiting ACLs at the network perimeter to restrict inbound API requests to known, authorized administrative IP addresses.

Exploitation Status

Public Exploit Available: Unknown.

Analyst Notes: As of October 10, 2025, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw is inherently dangerous due to its automatable nature and the lack of required authentication for an attacker to trigger the exhaustion state.

Analyst Recommendation

Juniper Junos Space administrators must prioritize the application of the provided security patches to eliminate this denial of service vector. Since the vulnerability requires no authentication to trigger, the risk of external disruption is elevated, and immediate patching is the only definitive method to ensure the continued availability of the management interface.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos Space Security Director
AFFECTED_VERSIONS: All versions prior to 24.1R3 Patch V4
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/JSA103157","name":null,"tags":["vendor-advisory"]},{"url":"https://www.juniper.net/documentation/us/en/software/nm-apps24.1/junos-space-security-director/topics/task/junos-space-metadata-creating.html","name":null,"tags":["technical-description"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T19:15:07.706Z
---END_METADATA---

Description Summary:
A missing authorization vulnerability in Juniper Networks Junos Space Security Director allows unauthenticated attackers to read or modify metadata, enabling potential security policy bypasses.

Executive Summary:
A critical missing authorization vulnerability in Juniper Networks Junos Space Security Director allows unauthenticated attackers to manipulate metadata, potentially bypassing critical firewall security controls.

Vulnerability Details

CVE-ID: CVE-2025-59968

Affected Software: Juniper Networks Junos Space Security Director

Affected Versions: All versions prior to 24.1R3 Patch V4

Vulnerability: The application fails to perform proper authorization checks, allowing an unauthenticated, network-based attacker to read or modify metadata through the web interface. This manipulation allows for the alteration of managed SRX Series device policies, potentially resulting in unauthorized network traffic being permitted.

Business Impact

Successful exploitation of this vulnerability poses a severe risk to organizational network security. By tampering with metadata, an attacker can effectively neutralize firewall policy rules, leading to the bypass of security controls and unauthorized network access. Given the CVSS score of 8.6, this flaw represents a significant risk to the integrity and confidentiality of the internal network infrastructure.

Remediation Plan

Immediate Action: Upgrade Junos Space Security Director to version 24.1R3 Patch V4, 24.1R4, or any subsequent release provided by the vendor.

Proactive Monitoring: Review administrative access logs and metadata configuration logs for unauthorized modifications or unexpected changes to firewall policy associations.

Compensating Controls: Restrict network access to the Junos Space Security Director web interface to authorized management subnets only, utilizing firewall rules or VPN-based access to minimize the exposure of the administrative interface to untrusted networks.

Exploitation Status

Public Exploit Available: No (exploit_available: false)

Analyst Notes: As of October 10, 2025, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw is inherently dangerous due to its ability to be triggered by an unauthenticated attacker, which significantly lowers the barrier for exploitation.

Analyst Recommendation

The ability for an unauthenticated user to alter metadata that influences firewall policy enforcement is a critical security failure. Administrators must prioritize the application of the vendor-provided patch immediately to prevent potential policy bypass. Failure to remediate this vulnerability leaves the managed network environment exposed to unauthorized traffic and potential security policy degradation.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Junos OS
AFFECTED_VERSIONS: 24.4 before 24.4R1-S3, 24.4R2
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/JSA103153","name":null,"tags":["vendor-advisory"]},{"url":"https://www.juniper.net/documentation/us/en/software/junos/cli-reference/topics/ref/statement/sampling-edit-forwarding-options.html","name":null,"tags":["technical-description"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T19:15:07.706Z
---END_METADATA---

Description Summary:
A Use of Uninitialized Resource vulnerability in the Juniper Junos OS Packet Forwarding Engine allows an unauthenticated network attacker to trigger a sustained Denial of Service on SRX4700 devices.

Executive Summary:
An unauthenticated remote attacker can cause a sustained Denial of Service on Juniper SRX4700 devices by triggering an FPC crash via crafted traffic when sampling is enabled.

Vulnerability Details

CVE-ID: CVE-2025-59964

Affected Software: Juniper Networks Junos OS

Affected Versions: 24.4 up to (excluding) 24.4R1-S3, 24.4R2

Vulnerability: This vulnerability involves a Use of Uninitialized Resource within the Packet Forwarding Engine (PFE). When forwarding-options sampling is enabled, an unauthenticated attacker can send traffic destined for the Routing Engine, which causes the Flexible PIC Concentrator (FPC) to crash and restart, resulting in a sustained Denial of Service condition.

Business Impact

The exploitation of this vulnerability results in a complete loss of service for the affected SRX4700 hardware, as the PFE line card becomes unresponsive and requires intervention. Given the CVSS score of 7.5, this high-severity flaw poses a significant risk to network availability, potentially disrupting critical infrastructure or business operations that rely on these devices for traffic routing and security enforcement.

Remediation Plan

Immediate Action: Upgrade Junos OS to versions 24.4R1-S3, 24.4R2, 25.2R1, or any subsequent release as recommended by the vendor.

Proactive Monitoring: Monitor device logs for repeated FPC crash events or unexpected line card restarts that coincide with periods of high traffic volume.

Compensating Controls: If patching is not immediately feasible, consider disabling the forwarding-options sampling feature, as the vulnerability is dependent on this configuration being active.

Exploitation Status

Public Exploit Available: Unknown.

Analyst Notes: As of October 10, 2025, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw is inherently dangerous due to its ability to be triggered remotely by unauthenticated actors, though it requires a specific configuration (sampling) to be active.

Analyst Recommendation

This vulnerability presents a clear risk to network stability due to the ease of triggering a crash via standard network traffic. Organizations utilizing Juniper SRX4700 devices must prioritize the implementation of the provided software updates to prevent potential service disruptions. If an immediate upgrade cannot be performed, disabling the vulnerable sampling configuration is the most effective temporary mitigation.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Session Smart Router, Session Smart Conductor, WAN Assurance Managed Router
AFFECTED_VERSIONS: 5.6.7-5.6.16, 6.1.0-6.1.11-lts, 6.2.0-6.2.7-lts, 6.3.0-6.3.2-r2
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/","name":null,"tags":["vendor-advisory"]},{"url":"https://support.juniper.net/support/eol/software/ssr/","name":null,"tags":["related"]},{"url":"https://kb.juniper.net/JSA94663","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T19:15:04.830Z
---END_METADATA---

Description Summary:
An authentication bypass vulnerability in Juniper Networks Session Smart products allows unauthenticated, network-based attackers to gain administrative control over the affected device.

Executive Summary:
A critical authentication bypass vulnerability in Juniper Networks Session Smart Router, Conductor, and WAN Assurance Managed Routers allows unauthenticated attackers to achieve full administrative control.

Vulnerability Details

CVE-ID: CVE-2025-21589

Affected Software: Juniper Networks Session Smart Router, Session Smart Conductor, and WAN Assurance Managed Router

Affected Versions: See individual product version ranges provided in the vendor security advisory (JSA94663).

Vulnerability: This is an authentication bypass using an alternate path or channel (CWE-288) that enables unauthenticated network-based attackers to interact with the device as an administrator. The vulnerability is highly automatable and impacts the confidentiality, integrity, and availability of the device management functions.

Business Impact

Successful exploitation grants an attacker full administrative control over the affected routing infrastructure. This leads to complete compromise of network traffic, unauthorized configuration changes, and potential exfiltration of sensitive data traversing the network. Given the CVSS score of 9.8, this vulnerability poses a catastrophic risk to organizational operations and network security.

Remediation Plan

Immediate Action: Upgrade all affected software to versions 5.6.17, 6.1.12-lts, 6.2.8-lts, 6.3.3-r2, or later. In Conductor-managed environments, upgrading the Conductor nodes will automatically propagate the fix to connected routers.

Proactive Monitoring: Monitor device access logs for unauthorized administrative login attempts or unusual configuration modifications originating from unexpected network segments.

Compensating Controls: Restrict management interface access to trusted administrative networks or VPNs using firewall access control lists to prevent external network-based exploitation.

Exploitation Status

Public Exploit Available: Unknown

Analyst Notes: As of January 27, 2026, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. The flaw is highly dangerous due to its network-accessible, unauthenticated nature, which allows for remote, automated exploitation without user interaction.

Analyst Recommendation

Due to the critical nature of this vulnerability and the potential for total system compromise, administrators must prioritize patching as the primary remediation strategy. Apply the recommended software updates immediately to all affected Session Smart infrastructure to eliminate the risk of unauthorized administrative access.

---METADATA---
VENDOR: Juniper Networks
PRODUCT: Security Director Policy Enforcer
AFFECTED_VERSIONS: All versions before 23.1R1 Hotpatch v3
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"https://supportportal.juniper.net/JSA103437","name":null,"tags":["vendor-advisory"]}]
PROFILE: batch@eb21ac00f78b
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T19:15:07.706Z
---END_METADATA---

Description Summary:
A missing authentication vulnerability in Juniper Networks Security Director Policy Enforcer allows an unauthenticated attacker to replace legitimate vSRX images with malicious ones during deployment.

Executive Summary:
An unauthenticated, network-based attacker can manipulate critical software deployment processes in Juniper Networks Security Director Policy Enforcer, leading to the potential execution of malicious code.

Vulnerability Details

CVE-ID: CVE-2025-11198

Affected Software: Juniper Networks Security Director Policy Enforcer

Affected Versions: All versions before 23.1R1 Hotpatch v3

Vulnerability: This vulnerability is caused by missing authentication for a critical function, which allows an unauthenticated network-based attacker to intercept and replace legitimate vSRX images with malicious versions during deployment to VMware NSX.

Business Impact

The ability to replace legitimate virtual appliance images with malicious ones presents a critical risk to infrastructure integrity and security. This flaw could allow an attacker to gain unauthorized control over virtualized environments, potentially leading to widespread data compromise and long-term persistence within the network. Given the CVSS score of 7.4, this vulnerability represents a high-severity risk that could severely impact the confidentiality and integrity of the affected organizational network.

Remediation Plan

Immediate Action: Upgrade to Security Director Policy Enforcer version 23.1 Hotpatch v3, 24.1R4, or any subsequent release, and perform a mandatory rotation of secrets across all affected devices.

Proactive Monitoring: Monitor deployment logs and VMware NSX integration activities for unauthorized image uploads or unexpected changes to virtual machine configurations.

Compensating Controls: Ensure that the Security Director Policy Enforcer instance is restricted to management networks and utilize network segmentation to limit exposure to untrusted network-based attackers.

Exploitation Status

Public Exploit Available: No (exploit_available: false)

Analyst Notes: As of October 10, 2025, there is no public information indicating active exploitation or a public proof-of-concept for this vulnerability. While exploitation is not currently observed, the severity of the impact necessitates prompt attention to the vendor-provided security updates.

Analyst Recommendation

This vulnerability poses a significant risk to the integrity of virtualized security infrastructure by allowing unauthorized modification of critical software images. Administrators must prioritize the application of the specified security patches and follow the vendor guidance regarding the rotation of secrets to ensure that any potential unauthorized access is neutralized. Immediate remediation is strongly advised to prevent potential compromise of the virtualization management plane.

---METADATA---
VENDOR: Juniper
PRODUCT: ScreenOS
AFFECTED_VERSIONS: Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before 6.3.0r13b, 6.3.0r14 before 6.3.0r14b, 6.3.0r15 before 6.3.0r15b, 6.3.0r16 before 6.3.0r16b, 6.3.0r17 before 6.3.0r17b, 6.3.0r18 before 6.3.0r18b, 6.3.0r19 before 6.3.0r19b, and 6.3.0r20 before 6.3.0r21.
CONFIDENCE: high
MISSING: none
SOURCES_JSON: [{"url":"http://arstechnica.com/security/2015/12/unauthorized-code-in-juniper-firewalls-decrypts-encrypted-vpn-traffic/","name":null,"tags":[]},{"url":"http://www.wired.com/2015/12/juniper-networks-hidden-backdoors-show-the-risk-of-government-backdoors/","name":null,"tags":[]},{"url":"http://www.securitytracker.com/id/1034489","name":"1034489","tags":["vdb-entry"]},{"url":"http://www.kb.cert.org/vuls/id/640184","name":"VU#640184","tags":["third-party-advisory"]},{"url":"https://forums.juniper.net/t5/Security-Incident-Response/Important-Announcement-about-ScreenOS/ba-p/285554","name":null,"tags":[]},{"url":"https://github.com/hdm/juniper-cve-2015-7755","name":null,"tags":[]},{"url":"http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10713","name":null,"tags":[]},{"url":"http://twitter.com/cryptoron/statuses/677900647560253442","name":null,"tags":[]}]
PROFILE: grounded@eead9838b633
MODEL: gemini-3.1-flash-lite
GENERATED: 2026-08-29T14:44:09.113Z
---END_METADATA---

Description Summary:
A critical authentication bypass in Juniper ScreenOS allows remote, unauthenticated attackers to gain administrative access via SSH or Telnet by providing a specific, hardcoded password.

Executive Summary:
Juniper ScreenOS is affected by a critical authentication bypass vulnerability that is currently being actively exploited in the wild to gain full administrative control over affected firewalls.

Vulnerability Details

CVE-ID: CVE-2015-7755

Affected Software: Juniper ScreenOS

Affected Versions: Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before 6.3.0r13b, 6.3.0r14 before 6.3.0r14b, 6.3.0r15 before 6.3.0r15b, 6.3.0r16 before 6.3.0r16b, 6.3.0r17 before 6.3.0r17b, 6.3.0r18 before 6.3.0r18b, 6.3.0r19 before 6.3.0r19b, and 6.3.0r20 before 6.3.0r21.

Vulnerability: This flaw involves unauthorized, hardcoded code within the operating system that permits any unauthenticated remote attacker to bypass authentication mechanisms during SSH or Telnet sessions. By entering a specific, undisclosed password, an attacker can achieve complete administrative access to the device.

Business Impact

The compromise of a network firewall presents a catastrophic risk to organizational security, as it grants attackers the ability to intercept traffic, modify firewall rules, and gain a foothold into the internal network. Given the CVSS score of 9.5, this vulnerability is classified as critical, reflecting the ease of exploitation and the total loss of confidentiality, integrity, and availability. Unauthorized access to these devices can lead to large scale data exfiltration and complete loss of network visibility.

Remediation Plan

Immediate Action: Update the affected Juniper ScreenOS devices to the patched versions: 6.2.0r19, 6.3.0r21, or the specific "b" suffix releases (6.3.0r12b, 6.3.0r13b, 6.3.0r14b, 6.3.0r15b, 6.3.0r16b, 6.3.0r17b, 6.3.0r18b, 6.3.0r19b).

Proactive Monitoring: Review firewall administrative access logs for unusual login attempts or connections originating from unauthorized IP addresses.

Compensating Controls: Disable Telnet and restrict SSH access to known, trusted management IP addresses to reduce the attack surface until the firmware patch is applied.

Exploitation Status

Public Exploit Available: Yes, a public exploit is available via a Metasploit module and various documented proof-of-concept repositories.

Analyst Notes: This vulnerability is confirmed to be actively exploited in the wild as of October 2, 2025. The backdoor password was publicly disclosed shortly after the initial discovery, which significantly lowered the barrier for exploitation by unauthorized actors.

Analyst Recommendation

Due to the critical nature of this vulnerability and the confirmed active exploitation in the wild, immediate remediation is required. Administrators must prioritize patching these systems as they are primary targets for persistent threats looking to compromise network perimeters. If patching cannot be performed immediately, the device should be isolated from the network to prevent unauthorized access.