OpenVPN fixes 1 vulnerability

Do you think this report is well-written? *

Yes

Do you use this technology? *

Yes

Was this report useful to you?

Yes

We would be happy if you would describe:

The security services provided by CESNET are designed to provide significant support in ensuring the cybersecurity of connected organizations. Although we strive to provide quality and reliable services, it is not possible to guarantee absolute coverage of all security vulnerabilities. Our services should be seen as a complement to an organization's own security management, not as a replacement. The client bears ultimate responsibility for securing their environment.

This report was translated by AI; nobody has reviewed the translation yet. Original language: Slovak.

[TLP:CLEAR] OpenVPN fixes 1 vulnerability

With version 2.7_rc2, OpenVPN fixes 1 vulnerability.

OpenVPN - Heap Buffer Over-Read (CVE-2025-12106)

CVSS 9.1 (Critical)

An unauthenticated remote attacker can exploit insufficient input validation when processing IP addresses, which may cause a process crash or leakage of sensitive data [1].

The vulnerability is present in product:

OpenVPN; >=2.7_alpha1, <2.7_rc2

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

More information:

CVE-2025-12106 at cve.org, NVD
CWE-126: Buffer Over-read at cwe.mitre.org

The vulnerability was publicly disclosed 1. 12. 2025.

Report feedback

[TLP:CLEAR] OpenVPN fixes 1 vulnerability

OpenVPN - Heap Buffer Over-Read (CVE-2025-12106)

CVSS 9.1 (Critical)

Links