CVE-1999-0157: Cisco IOS

Medium severity, CVSS 5.0. EPSS: 1.1% chance of exploitation in the next 30 days.

Cisco PIX firewall and CBAC IP fragmentation attack results in a denial of service.

Affected products

• Cisco IOS: version 11.2p only; version 11.3t only; version 12.0 only; version 12.0t only
• Cisco Pix Firewall Software: version 4.2(1) only

Published 1998-08-18. Last modified 2026-06-16.