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2 vulnerabilities found for firmware by Tenda
CVE-2026-11405 (GCVE-0-2026-11405)
Vulnerability from nvd – Published: 2026-07-06 19:17 – Updated: 2026-07-08 13:40
VLAI
EPSS
VEX
Title
Hidden backdoor authentication mechanism in multiple versions of Tenda firmware allows admin access to web management interface
Summary
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
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-912 - Hidden Functionality
Assigner
References
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| Tenda | firmware |
Affected:
US_AC6V2.0RTL_V15.03.06.51_multi_T
|
|
| Tenda | firmware |
Affected:
US_AC5V1.0RTL_V15.03.06.48_multi_TDE01
|
|
| Tenda | firmware |
Affected:
US_AC10V1.0re_V15.03.06.46_multi_TDE01
|
|
| Tenda | firmware |
Affected:
US_W15EV1.0br_V15.11.0.5(1068_1567_841)_EN_TDE
|
|
| Tenda | firmware |
Affected:
US_FH1201V1.0BR_V1.2.0.14(408)_EN_TD
|
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CVE-2026-11405 (GCVE-0-2026-11405)
Vulnerability from cvelistv5 – Published: 2026-07-06 19:17 – Updated: 2026-07-08 13:40
VLAI
EPSS
VEX
Title
Hidden backdoor authentication mechanism in multiple versions of Tenda firmware allows admin access to web management interface
Summary
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
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-912 - Hidden Functionality
Assigner
References
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
| Tenda | firmware |
Affected:
US_AC6V2.0RTL_V15.03.06.51_multi_T
|
|
| Tenda | firmware |
Affected:
US_AC5V1.0RTL_V15.03.06.48_multi_TDE01
|
|
| Tenda | firmware |
Affected:
US_AC10V1.0re_V15.03.06.46_multi_TDE01
|
|
| Tenda | firmware |
Affected:
US_W15EV1.0br_V15.11.0.5(1068_1567_841)_EN_TDE
|
|
| Tenda | firmware |
Affected:
US_FH1201V1.0BR_V1.2.0.14(408)_EN_TD
|
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{
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