OpenVPN 2.8.0 Buffer Overflow in ovpndcowinversion AEAD Tag
CVE-2026-2738 Published on February 19, 2026
Buffer overflow in ovpndcowinversion 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
Vulnerability Analysis
CVE-2026-2738 is exploitable with local system access. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
Incorrect Calculation of Buffer Size
The software does not correctly calculate the size to be used when allocating a buffer, which could lead to a buffer overflow.
Affected Versions
OpenVPN ovpn-dco-win Version 2.8.0 is affected by CVE-2026-2738Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.