CVE-2025-34049: Optilink ONT1GEW GPON

Critical severity, CVSS 9.4. EPSS: 2.4% chance of exploitation in the next 30 days.

An OS command injection vulnerability exists in the OptiLink ONT1GEW GPON router firmware version V2.1.11_X101 Build 1127.190306 and earlier. The router’s web management interface fails to properly sanitize user input in the target_addr parameter of the formTracert and formPing administrative endpoints. An authenticated attacker can inject arbitrary operating system commands, which are executed with root privileges, leading to remote code execution. Successful exploitation enables full compromise of the device. Exploitation evidence was observed by the Shadowserver Foundation on 2025-02-04 UTC.

Affected products

• Optilink ONT1GEW GPON: up to and including V2.1.11_X101 Build 1127.190306

Published 2025-06-26. Last modified 2026-06-17.