Tenda W20E V5.0 Vulnerabilities: Auth Bypass, Telnet Activation & RCE (CVE-2026-67965/6/7)

Vulnerability Overview The Tenda W20E V5.0 wireless router contains three security vulnerabilities affecting firmware . These vulnerabilities include: 1. CVE-2026-67965: Authentication bypass + hidden ATE manufacturing backdoor. 2. CVE-2026-67966: Unauthorized activation of the Telnet daemon. 3. CVE-2026-67967: Command injection + stack buffer overflow (patch bypass). Affected Scope Product: Tenda W20E V5.0 wireless router Firmware: Hardware: Atheros AR71xx/AR724X, MIPS big-endian Web Server: GoAhead 3.3.0 (httpd, ELF32 MSB) Fix Version: Not available at the time of disclosure Mitigation No official fix version is currently available. Users are advised to take the following measures: Avoid using default passwords. Regularly update the firmware. Disable unnecessary services (e.g., Telnet). POC Code CVE-2026-67965 CVE-2026-67966 CVE-2026-67967 Verification All three vulnerabilities were successfully reproduced in a QEMU Malta MIPS full-system emulation environment using the affected firmware image. The endpoints responded in an unauthenticated manner, and the daemon responded to AES encrypted queries using a static key. Vendor Coordination Status: In progress Notification: In progress (CVE-2026-67966); other issues pending Response: None received as of release Public Disclosure: 2026-08-06 Disclaimer This repository is intended solely for authorized security testing and research purposes. Exploiting devices you do not own may be illegal. The researchers are not responsible for any misuse of the provided information. Author h01mes

Goal Reached Thanks to every supporter — we hit 100%!

Tenda W20E V5.0 Vulnerabilities: Auth Bypass, Telnet Activation & RCE (CVE-2026-67965/6/7)

More from this source