CVE-2025-13751: openvpn DoS — Fix

Description

Interactive service agent in OpenVPN version 2.5.0 through 2.6.16 and 2.7_alpha1 through 2.7_rc2 on Windows allows a local authenticated user to connect to the service and trigger an error causing a local denial of service.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-770 CWE-770

CWE-775 CWE-775

CWE-841 CWE-841

Affected Products

Vendor	Product	Versions
openvpn	openvpn	2.5.0 — 2.6.17
openvpn	openvpn	All
openvpn	openvpn	All
openvpn	openvpn	All
openvpn	openvpn	All
openvpn	openvpn	All
openvpn	openvpn	All
openvpn	openvpn	All
openvpn	openvpn	All
microsoft	windows	All

References

Advisories & Patches

https://community.openvpn.net/Security%20Announcements/CVE-2025-13751

Other References

https://www.mail-archive.com/[email protected]/msg00153.html https://www.mail-archive.com/[email protected]/msg00154.html

Frequently Asked Questions

What is CVE-2025-13751? +

Interactive service agent in OpenVPN version 2.5.0 through 2.6.16 and 2.7_alpha1 through 2.7_rc2 on Windows allows a local authenticated user to connect to the service and trigger an error causing a local denial of service. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-13751? +

CVE-2025-13751 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-13751? +

CVE-2025-13751 affects products from microsoft, openvpn, specifically: openvpn, windows. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-13751? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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