CVE-2011-1764: Exim

High severity, CVSS 7.5. EPSS: 3.9% chance of exploitation in the next 30 days.

Format string vulnerability in the dkim_exim_verify_finish function in src/dkim.c in Exim before 4.76 might allow remote attackers to execute arbitrary code or cause a denial of service (daemon crash) via format string specifiers in data used in DKIM logging, as demonstrated by an identity field containing a % (percent) character.

Affected products

• Exim Exim: up to and including 4.75; version 2.10 only; version 2.11 only; version 2.12 only; version 3.00 only; version 3.01 only; …

Published 2011-10-05. Last modified 2026-06-16.