Zyxel WRE6505 v2 Firmware Multiple Vulnerabilities

Command injection in Zyxel WRE6505 v2 firmware V1.00(ABDV.3)C0 allows unauthenticated adjacent network attackers to execute arbitrary operating system commands via crafted HTTP requests to the CGI interface. This vulnerability affects an end-of-life product with no vendor support, meaning no security patches will be released. Exploitation requires adjacent network access (same LAN segment) but no authentication, making it exploitable by any device on the local network including compromised IoT devices or malicious insiders.

Brute-force password attacks against the web management interface of Zyxel WRE6505 v2 firmware V1.00(ABDV.3)C0 succeed due to improper rate-limiting on authentication attempts, allowing adjacent LAN attackers to bypass authentication and gain administrative access without requiring valid credentials. The vulnerability affects a legacy wireless range extender model marked as end-of-life by Zyxel, with CVSS 6.5 reflecting high confidentiality impact but local network scope.

Zyxel WRE6505 v2 firmware stores sensitive configuration data in an insecure manner, allowing local administrators to download and decrypt backup configuration files, leading to disclosure of confidential credentials and network settings. The vulnerability affects firmware version V1.00(ABDV.3)C0 and requires local access with administrative privileges. No public exploit code or active exploitation has been identified; however, the product is no longer supported by Zyxel, limiting patch availability.