Description
Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow because database records are cast directly to internal structures without validation.
References (5)
Core 5
Core References
Vendor Advisory
https://exim.org/static/doc/security/
Scores
CVSS v3
7.0
EPSS
0.0011
EPSS Percentile
29.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-122
Status
published
Products (1)
exim/exim
< 4.99.1
Published
Dec 14, 2025
Tracked Since
Feb 18, 2026