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CVE-2026-11405 is an undocumented authentication backdoor in multiple Tenda firmware versions affecting the web management interface. The flaw resides in the login() function of the embedded web server binary, where normal MD5-based password verification is performed first and, on failure, an alternate hidden authentication path is invoked. That path retrieves a password from device configuration via GetValue("sys.rzadmin.password") and compares it directly in plaintext with the user-supplied password using strcmp(). If the comparison succeeds, the code assigns administrator privileges and creates a valid authenticated session. The username is not validated in this alternate path, so any supplied username can be accepted when paired with the configured backdoor password. The issue constitutes hidden functionality that bypasses the normal credential validation flow and exposes administrative access through an undocumented mechanism.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
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56 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Hidden authentication backdoor in Tenda router/network equipment firmware. The /bin/httpd login() function falls back to an alternate password from device configuration and grants administrator access without validating the username.
An authentication bypass vulnerability caused by an undocumented backdoor in Tenda firmware that can grant administrative access to affected networking devices’ web management interfaces.
An undocumented backdoor in multiple Tenda firmware versions that enables authentication bypass and grants administrative access to the device web management interface.
Недокументированный механизм аутентификации (бэкдор) в прошивках роутеров Tenda, позволяющий обойти обычную проверку пароля и получить полный административный доступ к веб-интерфейсу устройства.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.