CVE-2026-11405
Tenda · published 2026-07-06
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by CERT/CC via the CVE Program.
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
Filed by CERT/CC; not a statement by Tenda.
Status at the source
- NVD status: Deferred — NVD has not analysed this CVE.
Affected products, as the source lists them
| 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 |
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 3.1: 9.8 CRITICAL — as published by CISA-ADP (Secondary)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: none · Automatable: yes · Technical impact: total
DeSpy does not score records. These are the sources' own values.
Sources
References the source lists
- https://cwe.mitre.org/data/definitions/912.html
- https://kb.cert.org/vuls/id/213560
- https://www.kb.cert.org/vuls/id/213560
Source dates: published 2026-07-06, last changed 2026-07-08. DeSpy's copy of this version is dated 2026-09-28.
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