CVE-2026-84256 - Vulnerability Details - OpenCVE

Description

An argument parsing issue in OpenVPN 2.1_rc10 through 2.6.22 and 2.7_alpha1 through 2.7.6 on Windows allows remote authenticated users to execute arbitrary commands via a crafted certificate subject

Published: 2026-09-07

Score: 7.7 High

EPSS: n/a

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

OpenVPN

OpenVPN

unaffected

Version	Status	Constraints
`2.1_rc10`	affected	≤ 2.6.22
`2.7_alpha1`	affected	≤ 2.7.6

No data.

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://community.openvpn.net/Security%20Announcements/CVE-2026-84256

History

Mon, 07 Sep 2026 08:15:00 +0000

Type	Values Removed	Values Added
Description		An argument parsing issue in OpenVPN 2.1_rc10 through 2.6.22 and 2.7_alpha1 through 2.7.6 on Windows allows remote authenticated users to execute arbitrary commands via a crafted certificate subject
Weaknesses		CWE-78 CWE-88
References		https://community.openvpn.net/Security%20Announcements/CVE-2026-84256
Metrics		cvssV4_0 `{'score': 7.7, 'vector': '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'}`

Subscriptions

No data.

MITRE

Status: PUBLISHED

Assigner: OpenVPN

Published: 2026-09-07T07:55:27.465Z

Updated: 2026-09-07T07:55:27.465Z

Reserved: 2026-09-01T13:36:26.707Z

Link: CVE-2026-84256

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-09-07T08:17:13.777

Modified: 2026-09-07T08:17:13.777

Link: CVE-2026-84256

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

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