CVE-2025-67896
9.8
CRITICAL
CVSS 3.1
EPSS 0.07%
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.
How to fix CVE-2025-67896
To remediate CVE-2025-67896, upgrade the affected package to a fixed version below.
- Debian/exim4—upgrade to 4.99-7 or later
Is CVE-2025-67896 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 4.99-7
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |