CVE-2026-11604

EUVD-2026-36151
An incorrect buffer size calculation in the epoch key generator in OpenVPN ovpn-dco-win version 2.0.0 through 2.8.3 allows a remote authenticated peer to trigger a heap-based buffer overflow and kernel memory corruption via a crafted data packet, resulting in a system crash (denial of service).
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
OpenVPNCNA
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 26.65%
Affected Products (NVD)
VendorProductVersion
openvpnopenvpn
2.0.0 ≤
𝑥
≤ 2.8.3
𝑥
= Vulnerable software versions
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
openvpnovpn-dco-win
2.0.0 ≤
𝑥
≤ 2.5.8
CNA
Common Weakness Enumeration
References
https://community.openvpn.net/Security%20Announcements/CVE-2026-11604
https://github.com/OpenVPN/ovpn-dco-win/releases