CERT/CC Warns of Hidden Admin Backdoor in Tenda Router Firmware
Several versions of firmware released by Chinese network device manufacturer Tenda have been found to embed an undocumented authentication backdoor that enables administrative access to the devices' web management interfaces, the CERT Coordination Center (CERT/CC) warned Monday. "An attacker can exploit this vulnerability, tracked as CVE-2026-11405 , to bypass the password verification process and obtain full administrative control without valid credentials," the CERT/CC said in an alert. The vulnerability impacts multiple versions of the firmware - US_FH1201V1.0BR_V1.2.0.14(408)_EN_TD US_W15EV1.0br_V15.11.0.5(1068_1567_841)_EN_TDE US_AC10V1.0re_V15.03.06.46_multi_TDE01 US_AC5V1.0RTL_V15.03.06.48_multi_TDE01 US_AC6V2.0RTL_V15.03.06.51_multi_T The backdoor functionality is present within the "login()" function of the "/bin/httpd" web server binary. While the method initially follows a normal authentication path using MD5-based p...
ī Jul 07, 2026