CVE-2025-62291

HIGH

8.1

Description

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.

CVE Details

CVSS v3.1 Score8.1

SeverityHIGH

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

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

Published1/16/2026

Last Modified1/26/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-191

References

https://github.com/strongswan/strongswan/commits/master/src/libcharon/plugins/eap_mschapv2(cve@mitre.org)

https://github.com/strongswan/strongswan/releases(cve@mitre.org)

https://www.strongswan.org/blog/2025/10/27/strongswan-vulnerability-%28cve-2025-62291%29.html(cve@mitre.org)

https://lists.debian.org/debian-lts-announce/2025/11/msg00002.html(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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