CVE-2026-2738 Memory corruption in ovpn-dco-win
Local attackers can crash the system by sending oversized packets to the OpenVPN Windows driver due to a buffer overflow.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-2738?
CVE-2026-2738 is a medium-severity memory corruption vulnerability in OpenVPN ovpn-dco-win, published on 19 Feb 2026. 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
Buffer overflow in ovpn‑dco‑win version 2.8.0 allows local attackers to cause a system crash by sending too large packets to the remote peer when the AEAD tag appears at the end of the encrypted packet
Weakness: CWE-131
Which versions are affected by CVE-2026-2738?
How do I fix CVE-2026-2738?
No fix has been published for CVE-2026-2738 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-2738 being exploited?
There is no known exploitation of CVE-2026-2738 in the wild and no public exploit code.
Sources
Also known as GHSA-4jg5-735x-q4x2.