CVE-2026-81830

Trusted-directory bypass via incorrect path validation

Published Sep 7, 2026 · Updated Sep 8, 2026

Path validation in OpenVPN 2.4.0 through 2.6.22 on Windows allows local users to bypass trusted configuration-directory controls. The interactive service accepts a configuration path that its directory-containment validation does not correctly constrain. A low-privileged local account and passive user interaction are required; successful exploitation permits unauthorized configuration changes with high-integrity effects.

CVSS severity5.6
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path validation in OpenVPN 2.4.0 through 2.6.22 on Windows allows local users to bypass trusted configuration-directory controls. The interactive service accepts a configuration path that its directory-containment validation does not correctly constrain. A low-privileged local account and passive user interaction are required; successful exploitation permits unauthorized configuration changes with high-integrity effects.

The record

CVE
CVE-2026-81830
Published
Sep 7, 2026
Updated
Sep 8, 2026
Vendor
OpenVPN Inc.
Product
OpenVPN
Classifications
CWE-73
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=2.4.0 <=2.6.22

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

OpenVPN Inc. · OpenVPNversion=2.4.0 <=2.6.22

Published CVSS scores

5.6OpenVPNCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-73External Control of File Name or Path

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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