CVE-2026-84256 | CVE Tracker

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

Scores

CVSS scores of CVE-2026-84256, by who scored it
Scored by	CVSS	Score	Vector
OpenVPNCNA (assigner)	4.0	High7.7	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
NVDNVD · Awaiting Analysis	4.0	High7.7	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS (exploitation in 30 days): 0.38% · top 67% of all CVEs (6 Nov 2026)
CISA SSVC: Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.7.

Weakness

CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection') (opens in a new tab)All about CWE-78 and its CVEs
CWE-88 Improper neutralization of argument delimiters in a command ('argument injection') (opens in a new tab)All about CWE-88 and its CVEs

Affected products

OpenVPN · OpenVPN
- affected 2.1_rc10 – ≤ 2.6.22
- affected 2.7_alpha1 – ≤ 2.7.7

References (1)

https://community.openvpn.net/Security%20Announcements/CVE-2026-84256 (opens in a new tab)vendor-advisory

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

[![CVE-2026-84256](https://trackcve.app/badge/CVE-2026-84256.svg)](https://trackcve.app/cve/CVE-2026-84256)

Record last updated 13 Oct 2026, 22:25 UTC.

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…