CVE-2025-67896

Critical · 9.8

CVSS

9.8

EPSS

0.5%

Published

Dec 14, 2025

CISA due date

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The record

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.

Affected packages

Ecosystem	Package	Introduced	Fixed