CVE-2025-62291 HIGH

CVE-2025-62291

Vendor Strongswan
Product strongSwan
Weakness CWE-191
Published January 16, 2026
Last update January 16, 2026

CVSS base score

8.1/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

In the eap-mschapv2 plugin (client-side) in strongSwan before 6.0.3, a malicious EAP-MSCHAPv2 server can send a crafted message of size 6 through 8, and cause an integer underflow that potentially results in a heap-based buffer overflow.

Key dates

02Disclosure timeline

January 16, 2026 CVE published
January 16, 2026 Record updated