Command Injection in Tenda AC15 AC1900 goform/setUsbUnload

Successful exploitation allows arbitrary system command execution on the affected router. Because the vulnerable component executes attacker-supplied commands at the OS level, compromise can lead to full device takeover, modification of configuration, malware installation, botnet enrollment, persistence, traffic interception, and use of the router as a pivot point into the local network.

Do not expose the router's management interface to the internet. Restrict access to administrative HTTP/HTTPS endpoints to trusted internal hosts or a dedicated management network, disable remote administration if not required, and enforce network-layer filtering to block access to goform endpoints from untrusted sources. Monitor for suspicious POST requests to /goform/setUsbUnload and signs of unexpected command execution or botnet activity on the device. Where patching is not possible, isolate or replace the device.

Upgrade the affected Tenda AC15 AC1900 firmware to a vendor-fixed release if one is available. If no patched firmware is available, replace the device with a supported model or remove the vulnerable management interface from exposure. Remediation should include validating that the goform/setUsbUnload endpoint is no longer reachable by untrusted users and that input to the deviceName parameter is properly sanitized or no longer passed to shell commands.