CVE-2026-105390

EUVD-2026-100757
Improper synchronization in the OpenVPN ovpn-dco-win for Windows versions 0.6.5 through 1.3.5 and 2.4.0 through 2.8.7 allows local attackers to trigger a deadlock via a crafted write to the ovpn-dco device, causing the host to become unresponsive.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
OpenVPNCNA
6.9 MEDIUM
LOCAL
LOW
NONE
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 1.35%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
openvpnovpn-dco-win
0.6.5 ≤
𝑥
≤ 1.3.5
CNA
openvpnovpn-dco-win
2.4.0 ≤
𝑥
≤ 2.8.7
CNA
Common Weakness Enumeration
References
https://community.openvpn.net/Security%20Announcements/CVE-2026-105390