A critical stack-based buffer overflow in the Tenda F453 router poses a significant risk of remote code execution for authenticated users.

This vulnerability is a buffer overflow (CWE-120) occurring within the fromSetWifiGusetBasic function of the /goform/AdvSetWrlsafeset endpoint. An authenticated attacker can trigger this memory corruption by sending a crafted HTTP POST request containing an excessively long mit_ssid parameter, which lacks necessary length validation.

The exploitation of this vulnerability can result in full system compromise, including unauthorized remote code execution or persistent denial of service conditions. Given the CVSS score of 8.8, this flaw represents a high-severity risk that could lead to complete loss of router control, potentially facilitating lateral movement within the network or interception of sensitive traffic.

Immediate Action: Update the Tenda F453 firmware to the latest available version provided by the vendor to remediate the buffer overflow vulnerability.

Proactive Monitoring: Monitor network traffic for anomalous HTTP POST requests directed toward the /goform/AdvSetWrlsafeset endpoint and review system logs for signs of service crashes or unauthorized configuration changes.

Compensating Controls: Restrict access to the router management interface to trusted administrative IP addresses and employ a WAF or network-level inspection to filter requests containing unusually large input strings in the mit_ssid field.

Public Exploit Available: Yes, a published proof-of-concept exists as detailed in the researcher write-up at the provided GitHub reference.

The presence of a publicly available proof-of-concept significantly lowers the barrier for exploitation by malicious actors. Administrators must prioritize updating the affected Tenda F453 units to the latest firmware version immediately. If an update is not immediately feasible, restrict administrative access to the device to mitigate the risk of remote exploitation.