CVE-1999-1582: Cisco Pix Firewall

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

By design, the "established" command on the Cisco PIX firewall allows connections from one host to arbitrary ports of a target host if an alternative conduit has already been allowed, which can cause administrators to configure less restrictive access controls than intended if they do not understand this functionality.

Affected products

• Cisco Pix Firewall: any version

Published 1998-07-15. Last modified 2026-06-16.