CVE-2004-0400

score

<0.1

cvss

7.5

epss

7.0%

published

2004-07-07

kev added

—

first seen

2026-10-21

Exim 4 < 4.33 with headers_check_syntax enabled contains a stack-based buffer overflow caused by improper header syntax handling, letting remote attackers cause denial of service or execute arbitrary code during header check, exploit requires sending crafted headers.