CVE-2004-0400: University Of Cambridge Exim

High severity, CVSS 7.5. EPSS: 7% chance of exploitation in the next 30 days.

Stack-based buffer overflow in Exim 4 before 4.33, when the headers_check_syntax option is enabled, allows remote attackers to cause a denial of service and possibly execute arbitrary code during the header check.

Affected products

• University Of Cambridge Exim: up to and including 4.32

Published 2004-07-07. Last modified 2026-06-16.