CVE-2005-1521: GNU Mailutils

High severity, CVSS 7.5. EPSS: 3.3% chance of exploitation in the next 30 days.

Integer overflow in the fetch_io function of the imap4d server in GNU Mailutils 0.5 and 0.6, and other versions before 0.6.90, allows remote attackers to execute arbitrary code via a partial message request with a large value in the END parameter, which leads to a heap-based buffer overflow.

Affected products

• GNU Mailutils: version 0.5 only; version 0.6 only

Published 2005-05-26. Last modified 2026-06-16.