CVE-1999-0430: Cisco Catalyst 12xx Supervisor Software

Medium severity, CVSS 5.0. EPSS: 1.9% chance of exploitation in the next 30 days.

Cisco Catalyst LAN switches running Catalyst 5000 supervisor software allows remote attackers to perform a denial of service by forcing the supervisor module to reload.

Affected products

• Cisco Catalyst 12xx Supervisor Software: version 4.29 only
• Cisco Catalyst 29xx Supervisor Software: version 1.0 only; version 2.1.5 only; version 2.1.501 only; version 2.1.502 only
• Cisco Catalyst 5xxx Supervisor Software: version 1.0 only; version 2.1.5 only; version 2.1.501 only; version 2.1.502 only

Published 1999-03-01. Last modified 2026-06-16.