CVE-2025-12106

Name: CVE-2025-12106
Creator: NVD / NIST
Published: 2025-12-01T13:16:00.07+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 0.53%

Last modified Jun 17, 2026

CVE-2025-12106 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. Insufficient argument validation in OpenVPN 2.7_alpha1 through 2.7_rc1 allows an attacker to trigger a heap buffer over-read when parsing IP addresses. EPSS estimates a 0.53% chance of exploitation in the next 30 days.

Description

Insufficient argument validation in OpenVPN 2.7_alpha1 through 2.7_rc1 allows an attacker to trigger a heap buffer over-read when parsing IP addresses

Metrics

CVSS 3.1

9.1/10

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

EPSS Probability

0.53%

40.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-126

Affected Software

Vendor	Product	Versions	Update
Openvpn	Openvpn	2.6.13	—
Openvpn	Openvpn	2.7	Alpha1

References

https://community.openvpn.net/Security%20Announcements/CVE-2025-12106Vendor Advisory
https://www.mail-archive.com/openvpn-announce@lists.sourceforge.net/msg00152.htmlMailing List

Timeline

Published: Dec 1, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-12106?

Insufficient argument validation in OpenVPN 2.7_alpha1 through 2.7_rc1 allows an attacker to trigger a heap buffer over-read when parsing IP addresses

How severe is CVE-2025-12106?

CVE-2025-12106 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.53% probability of exploitation in the next 30 days.

How do I fix CVE-2025-12106?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-12106?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST