← Vulnerability feed

Vulnerability record · CVE-2025-12106 · published 1 December 2025

CVE-2025-12106: Openvpn vulnerability

Openvpn · Openvpn

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

9.1 CVSS 3.1 Critical EPSS 0.56% · top 55.9% CWE-126 · CWE-126
9.1CVSS 3.1 base score
0.56%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
26 Sep 2026Last modified by NVD

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

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://community.openvpn.net/Security%20Announcements/CVE-2025-12106 Vendor Advisory
https://www.mail-archive.com/[email protected]/msg00152.html Mailing List

Track CVE-2025-12106 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-27903Openvpn unrestricted file upload vulnerabilityOpenVPN plug-ins on Windows with OpenVPN 2.6.9 and earlier could be loaded from any directory, which allows an attacker to load an arbitrary plug-in …EPSS 8.9%9.8CVE-2023-46850Openvpn use after free vulnerabilityUse after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buff…EPSS 2.0%9.8CVE-2022-0547Openvpn improper authentication vulnerabilityOpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of def…EPSS 3.6%9.8CVE-2017-12166Openvpn out-of-bounds write vulnerabilityOpenVPN versions before 2.3.3 and 2.4.x before 2.4.4 are vulnerable to a buffer overflow vulnerability when key-method 1 is used, possibly resulting …EPSS 3.6%9.1CVE-2024-5594Openvpn vulnerabilityOpenVPN before 2.6.11 does not santize PUSH_REPLY messages properly which an attacker controlling the server can use to inject unexpected arbitrary d…EPSS 0.84%9.1CVE-2018-7544Openvpn vulnerabilityA cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this interface is enabled over TCP without…EPSS 1.8%9.0CVE-2006-1629Openvpn vulnerabilityOpenVPN 2.0 through 2.0.5 allows remote malicious servers to execute arbitrary code on the client by using setenv with the LD_PRELOAD environment var…EPSS 3.1%8.8CVE-2024-4877Openvpn vulnerabilityOpenVPN version 2.4.0 through 2.6.10 on Windows allows an external, lesser privileged process to create a named pipe which the OpenVPN GUI component …EPSS 0.43%

Source: NIST National Vulnerability Database (record CVE-2025-12106), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.