CVE-2025-34049 OptiLink ONT1GEW GPON Remote Code Execution
An authenticated attacker can inject OS commands via the web interface to execute arbitrary code with root privileges on OptiLink GPON routers.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-34049?
CVE-2025-34049 is a critical command injection vulnerability in OptiLink ONT1GEW GPON, published on 26 Jun 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-78
Which versions are affected by CVE-2025-34049?
How do I fix CVE-2025-34049?
No fix has been published for CVE-2025-34049 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2025-34049 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34049 exists.
Sources
Also known as GHSA-53rj-48p2-7m5j.