CVE-2001-1009: Fetchmail

High severity, CVSS 10.0. EPSS: 6.5% chance of exploitation in the next 30 days.

Fetchmail (aka fetchmail-ssl) before 5.8.17 allows a remote malicious (1) IMAP server or (2) POP/POP3 server to overwrite arbitrary memory and possibly gain privileges via a negative index number as part of a response to a LIST request.

Affected products

• Fetchmail Fetchmail: up to and including 5.8.14; version 4.5.1 only; version 4.5.2 only; version 4.5.3 only; version 4.5.4 only; version 4.5.5 only; …

Published 2001-08-31. Last modified 2026-06-16.