CVE-2025-62291
High
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.
SeverityHigh
CVSS8.1
Exploit probability—
ProductstrongSwan
PublishedJan 16, 2026
First seenJan 16, 2026
Weakness typeCWE-191CWE-191
How to fix
Update
- strongSwan strongSwan6.0.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| strongSwan strongSwan | 4.2.12 ≤ v < 6.0.3 | 6.0.3 |
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