CVE-2001-1421: Aol Instant Messenger

Medium severity, CVSS 5.0. EPSS: 2.4% chance of exploitation in the next 30 days.

AOL Instant Messenger (AIM) 4.7 and earlier allows remote attackers to cause a denial of service (application crash) via a large number of different fonts followed by an HTML HR tag.

Affected products

• Aol Instant Messenger: up to and including 4.7

Published 2001-10-06. Last modified 2026-06-16.