CVE-2026-84256

High

Description

An argument parsing issue in OpenVPN 2.1_rc10 through 2.6.22 and 2.7_alpha1 through 2.7.7 on Windows allows remote authenticated users to execute arbitrary commands via a crafted certificate subject

SeverityHigh

CVSS7.7

Exploit probability—

ProductOpenVPN

PublishedSep 7, 2026

First seenSep 7, 2026

Weakness typeCWE-78OS command injection CWE-88CWE-88

How to fix

Vendor advisories

community.openvpn.net/Security%20Announcements/CVE-2026-84256

Affected products

Product	Affected versions	Fixed in
OpenVPN OpenVPN	2.1_rc10 ≤ v ≤ 2.6.22, 2.7_alpha1 ≤ v ≤ 2.7.7	—

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