CVE-2004-0043: Yahoo Messenger

High severity, CVSS 7.5. EPSS: 3.6% chance of exploitation in the next 30 days.

Buffer overflow in Yahoo Instant Messenger 5.6.0.1351 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long filename in the download feature.

Affected products

• Yahoo Messenger: up to and including 5.6.0.1351

Published 2004-02-03. Last modified 2026-06-16.