9.8 CVE-2026-11405

Enriched by CISA
 

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
https://nvd.nist.gov/vuln/detail/CVE-2026-11405

Categories

No category defined

References


 

AFFECTED (from MITRE)

Vendor Product Versions
Tenda firmware
  • US_AC6V2.0RTL_V15.03.06.51_multi_T [affected]
Tenda firmware
  • US_AC5V1.0RTL_V15.03.06.48_multi_TDE01 [affected]
Tenda firmware
  • US_AC10V1.0re_V15.03.06.46_multi_TDE01 [affected]
Tenda firmware
  • US_W15EV1.0br_V15.11.0.5(1068_1567_841)_EN_TDE [affected]
Tenda firmware
  • US_FH1201V1.0BR_V1.2.0.14(408)_EN_TD [affected]
© 2022 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.

CPE

cpe start end

REMEDIATION


EXPLOITS

Exploit-db.com

id description date
No known exploits

POC Github

Url
No known exploits

Other Nist (github, ...)

Url
No known exploits

CAPEC

Common Attack Pattern Enumerations and Classifications

id description severity
No entry