CVE-2026-11405
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Hidden backdoor authentication mechanism in multiple versions of Tenda firmware allows admin access to web management interface
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
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
firmware
- Vendor
- Tenda
- Product
- firmware
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| US_AC6V2.0RTL_V15.03.06.51_multi_T | affected | Unavailable | Unavailable | Unavailable | None listed |
firmware
- Vendor
- Tenda
- Product
- firmware
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| US_AC5V1.0RTL_V15.03.06.48_multi_TDE01 | affected | Unavailable | Unavailable | Unavailable | None listed |
firmware
- Vendor
- Tenda
- Product
- firmware
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| US_AC10V1.0re_V15.03.06.46_multi_TDE01 | affected | Unavailable | Unavailable | Unavailable | None listed |
firmware
- Vendor
- Tenda
- Product
- firmware
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| US_W15EV1.0br_V15.11.0.5(1068_1567_841)_EN_TDE | affected | Unavailable | Unavailable | Unavailable | None listed |
firmware
- Vendor
- Tenda
- Product
- firmware
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| US_FH1201V1.0BR_V1.2.0.14(408)_EN_TD | affected | Unavailable | Unavailable | Unavailable | None listed |