A critical stack-based buffer overflow in Tenda RX3 routers allows remote attackers to compromise device integrity, posing a significant risk of unauthorized command execution.

The device contains a stack-based buffer overflow in the setIpMacBind function within the /goform/SetIpMacBind file. The vulnerability is triggered via malicious manipulation of the argument list and requires low privileges to execute remotely.

Successful exploitation of this vulnerability can lead to a complete compromise of the affected router, granting an attacker the ability to execute arbitrary code with high privileges. This risk may result in unauthorized network access, interception of sensitive traffic, or the redirection of internal traffic to malicious destinations. Given the CVSS score of 8.8, this flaw represents a high-severity risk that could lead to significant operational disruption and data breach scenarios.

Immediate Action: Since no official patch is currently identified, administrators should immediately restrict access to the web management interface of the Tenda RX3 to trusted internal network segments only.

Proactive Monitoring: Monitor device logs for unusual traffic patterns targeting the /goform/SetIpMacBind endpoint and watch for signs of unexpected reboots or service instability.

Compensating Controls: Implement strict firewall rules to block external access to the device management interface and consider placing the device behind an additional layer of perimeter security.

Public Exploit Available: Yes, a published proof-of-concept exists and is attributed to the research write-up referenced in the CVE record.

The presence of a public proof-of-concept and the potential for remote code execution elevate this vulnerability to a high priority. Until a vendor-supplied firmware update is verified and deployed, organizations must treat the Tenda RX3 as potentially compromised if exposed to untrusted networks. Immediate segmentation of management interfaces is the most effective temporary mitigation strategy to prevent unauthorized access.