A remote stack-based buffer overflow vulnerability in the Tenda F451 router exposes the device to potential memory corruption and unauthorized code execution.

This is a stack-based buffer overflow (CWE-121) occurring within the fromSafeUrlFilter function of the /goform/SafeUrlFilter file. The flaw is triggered by manipulating the page argument, which can be executed remotely by an authenticated user.

The exploitation of this vulnerability can lead to a complete compromise of the affected router, resulting in unauthorized access to network traffic or system instability. With a CVSS score of 8.8, this flaw represents a high-severity risk that could facilitate lateral movement within the network or persistent denial of service.

Immediate Action: Since a specific patch version is currently unknown, administrators should restrict management interface access to trusted IP addresses only and monitor for any unusual traffic patterns.

Proactive Monitoring: Security teams should review firewall and system logs for unexpected requests directed at the /goform/SafeUrlFilter endpoint, particularly those containing abnormally long strings in the page parameter.

Compensating Controls: Deploy a Web Application Firewall (WAF) or network-based intrusion detection system to filter and block malicious requests targeting the vulnerable URL parameter.

Public Exploit Available: Yes, a published proof-of-concept exists as detailed in the referenced GitHub issue.

Given the high CVSS score and the existence of a public proof-of-concept, this vulnerability poses a significant risk to network integrity. Organizations utilizing the affected Tenda hardware must prioritize hardening the management interface and applying any vendor-supplied firmware updates as soon as they become available to neutralize this threat.