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.
References (4)
Scores
CVSS v3
8.1
EPSS
0.0001
EPSS Percentile
2.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-191
Status
published
Products (1)
strongSwan/strongSwan
4.2.12 - 6.0.3
Published
Jan 16, 2026
Tracked Since
Feb 18, 2026