CVE-2004-1558: Ypops

High severity, CVSS 7.5. EPSS: 71.1% chance of exploitation in the next 30 days.

Multiple stack-based buffer overflows in YPOPs! (aka YahooPOPS) 0.4 through 0.6 allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long (1) POP3 USER command or (2) SMTP request.

Affected products

• Ypops Ypops: version 0.4 only; version 0.4.1 only; version 0.4.2 only; version 0.4.3 only; version 0.4.4 only; version 0.4.5 only; …

Published 2004-12-31. Last modified 2026-06-16.