CVE-2025-13086: openvpn — Fix

Description

Improper validation of source IP addresses in OpenVPN version 2.6.0 through 2.6.15 and 2.7_alpha1 through 2.7_rc1 allows an attacker to open a session from a different IP address which did not initiate the connection resulting in a denial of service for the originating client

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CVSS v3.1 Score

7.5

HIGH

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

Weakness Type (CWE)

CWE-940 CWE-940

Affected Products

Vendor	Product	Versions
openvpn	openvpn	2.6.0 — 2.6.16
openvpn	openvpn	All
openvpn	openvpn	All
openvpn	openvpn	All
openvpn	openvpn	All
openvpn	openvpn	All
openvpn	openvpn	All
openvpn	openvpn	All

References

Advisories & Patches

https://community.openvpn.net/Security%20Announcements/CVE-2025-13086

Other References

https://www.mail-archive.com/[email protected]/msg00151.html https://www.mail-archive.com/[email protected]/msg00152.html

Frequently Asked Questions

What is CVE-2025-13086? +

Improper validation of source IP addresses in OpenVPN version 2.6.0 through 2.6.15 and 2.7_alpha1 through 2.7_rc1 allows an attacker to open a session from a different IP address which did not initiate the connection resulting in a denial of service for the originating client It has a CVSS v3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-13086? +

CVE-2025-13086 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-13086? +

CVE-2025-13086 affects products from openvpn, specifically: openvpn. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-13086? +

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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