CVE-2025-62291

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.

Scoring

Severity

HIGH

CVSS base score

8.1

CVSS vector

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

EPSS probability

0.93%

CWE

CWE-191

Published

2026-01-16

Last modified

2026-03-13

Affected products

• strongSwan strongSwan

Weakness type

• CWE-191

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