CVE-2026-11604

Medium

Description

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).

SeverityMedium

CVSS6.5

Exploit probability—

ProductOpenvpn Ovpn-dco-win

PublishedJun 10, 2026

First seenJun 10, 2026

Weakness typeCWE-131CWE-131 CWE-122CWE-122 CWE-787Out-of-bounds write

How to fix

Vendor advisories

community.openvpn.net/Security%20Announcements/CVE-2026-11604

Affected products

Product	Affected versions	Fixed in
openvpn ovpn-dco-win	2.0.0 ≤ v ≤ 2.8.3	—

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