CVE-2002-2239: Cisco IOS

High severity, CVSS 7.8. EPSS: 1.6% chance of exploitation in the next 30 days.

The Cisco Optical Service Module (OSM) for the Catalyst 6500 and 7600 series running Cisco IOS 12.1(8)E through 12.1(13.4)E allows remote attackers to cause a denial of service (hang) via a malformed packet.

Affected products

• Cisco IOS: version 12.1e only

Published 2002-12-31. Last modified 2026-06-16.