CVE-2026-11405: Tenda firmware

Описание

Оригинално описание

The web server binary /bin/httpd contains a hidden backdoor authentication mechanism in the login() function at 004c88b8. - The function contains a normal authentication path using MD5/hash-based password verification (prod_encode64/PasswordToMd5/check_rand_key). - After normal authentication fails, it calls GetValue("sys.rzadmin.password") to read a backdoor password from the device configuration. - It performs a direct strcmp() comparison (plaintext, not hashed) between the config value and the user-supplied password. A successful match grants role=2 (admin-level access) and creates a valid session. The rzadmin username is never checked — any username works with the backdoor

Засегнати продукти

• Tenda firmware: US_AC6V2.0RTL_V15.03.06.51_multi_T
• Tenda firmware: US_AC5V1.0RTL_V15.03.06.48_multi_TDE01
• Tenda firmware: US_AC10V1.0re_V15.03.06.46_multi_TDE01
• Tenda firmware: US_W15EV1.0br_V15.11.0.5(1068_1567_841)_EN_TDE
• Tenda firmware: US_FH1201V1.0BR_V1.2.0.14(408)_EN_TD

История

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-11405
• https://nvd.nist.gov/vuln/detail/CVE-2026-11405
• https://cwe.mitre.org/data/definitions/912.html
• https://kb.cert.org/vuls/id/213560
• https://www.kb.cert.org/vuls/id/213560