CVE-2026-11604

5.6 mediumEPSS 0.3%

Medium (5.6) in openvpn ovpn-dco-win. EPSS 0.3% chance of exploitation in the next 30 days.

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).

Severity

CVSS 4.0

5.6 medium

CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

CVSS 3.1

6.5 medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 27% of CVEs (scores of 2026-10-31)
CWEs: CWE-122, CWE-131, CWE-787
Published: 2026-06-10
Modified: 2026-09-24
Record from: the NVD, synced 2026-10-19

Affected

openvpn:ovpn-dco-win

References

https://community.openvpn.net/Security%20Announcements/CVE-2026-11604
https://github.com/OpenVPN/ovpn-dco-win/releases

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