Description
In Exim before 4.99.2, when utf8 operators are enabled, there is an out-of-bounds read if large UTF-8 trailing characters are present (malformed UTF-8 header data). Information might be divulged within an error message produced during handling of an unrelated e-mail message.
References (5)
Scores
CVSS v3
3.7
EPSS
0.0003
EPSS Percentile
8.2%
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-125
Status
published
Products (1)
Exim/Exim
< 4.99.2
Published
Apr 30, 2026
Tracked Since
May 01, 2026