CVE-2025-13751 Denial of service in OpenVPN

Low 1.3 Published 3 Dec 2025 Updated 12 Dec 2025

A local authenticated user can trigger an error in the OpenVPN Windows service agent, causing a local denial of service.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2025-13751?

CVE-2025-13751 is a low-severity denial of service vulnerability in OpenVPN, published on 3 Dec 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Interactive service agent in OpenVPN version 2.5.0 through 2.6.16 and 2.7_alpha1 through 2.7_rc2 on Windows allows a local authenticated user to connect to the service and trigger an error causing a local denial of service.

Weakness: CWE-841, CWE-775, CWE-770

Which versions are affected by CVE-2025-13751?

It affects 1 product.

Products include Openvpn Openvpn.

How do I fix CVE-2025-13751?

No fix has been published for CVE-2025-13751 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-13751 being exploited?

There is no known exploitation of CVE-2025-13751 in the wild and no public exploit code.

Sources

Also known as GHSA-74jr-8vhj-2c3f.