CVE-1999-1175: Cisco IOS

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

Web Cache Control Protocol (WCCP) in Cisco Cache Engine for Cisco IOS 11.2 and earlier does not use authentication, which allows remote attackers to redirect HTTP traffic to arbitrary hosts via WCCP packets to UDP port 2048.

Affected products

• Cisco IOS: up to and including 11.2

Published 1999-12-31. Last modified 2026-06-16.