CVE-2026-81738

State: Published
Severity: 2.3 Low
Published: Sep 7, 2026
Updated: Sep 8, 2026
Reserved: Aug 27, 2026

Description

OpenVPN 2.5.0 through 2.7.6 on Windows using the tap-windows6 driver allows attackers to trigger an out-of-bounds write via crafted DOMAIN-SEARCH entries

Scores

CVSS	Score	Vector	Source
4.0	2.3 Low	CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L	OpenVPN

Weaknesses

CWE-121 Stack-based buffer overflow
CWE-193 Off-by-one error
CWE-787 Out-of-bounds write

Affected Products

Product	Versions
OpenVPNOpenVPN	2.5.0 through 2.7.6Affected

References

https://community.openvpn.net/Security%20Announcements/CVE-2026-81738vendor-advisory

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