PT-2026-48560 · Openvpn · Ovpn-Dco-Win

Published 2026-06-10 · Updated 2026-06-10 · CVE-2026-11604

NVD

CVSS v4.0

5.6

Medium

Base vector

AV:L/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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).

Fix

Memory Corruption

Heap Based Buffer Overflow

Weakness Enumeration

CWE-131

CWE-787

CWE-122

Related Identifiers

CVE-2026-11604

Affected Products

Ovpn-Dco-Win

References · 3

• https://community.openvpn.net/Security%20Announcements/CVE-2026-11604 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-11604 · Security Note
• https://github.com/OpenVPN/ovpn-dco-win/releases · Note