CVE-2026-81738

OpenVPN: Stack-based buffer overflow

CVE-2026-81738 is fixed in OpenVPN on 1 platform by OpenVPN 2.7.016 (version 2.7.016), released February 11, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

2.3

No vendor severity

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0033

26th percentile

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

Where it's fixed

Product	Fixed in	Fix	Released
Windows apps
OpenVPN	2.7.016	OpenVPN 2.7.016	Feb 11, 2026

Details

Published
September 7, 2026
Weakness
CWE-121: Stack-based buffer overflow
Vendor advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-81738

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