CVE-2025-62291

HIGH EPSS 54.5%
Published Jan 16, 20265mo ago · Modified Jun 17, 20262w ago
8.1 CVSS 3.1
High
Find Similar
Published Jan 16, 2026 5mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.1
Exploitability
2.2
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
54.5% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-191

References 4

  • github.com https://github.com/strongswan/strongswan/commits/master/src/libcharon/plugins/eap_mschapv2
  • github.com https://github.com/strongswan/strongswan/releases
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/11/msg00002.html
  • strongswan.org https://www.strongswan.org/blog/2025/10/27/strongswan-vulnerability-%28cve-2025-62291%29.html

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.