CVE-2000-1027: Cisco Pix Firewall Software

Medium severity, CVSS 5.0. EPSS: 3.5% chance of exploitation in the next 30 days.

Cisco Secure PIX Firewall 5.2(2) allows remote attackers to determine the real IP address of a target FTP server by flooding the server with PASV requests, which includes the real IP address in the response when passive mode is established.

Affected products

• Cisco Pix Firewall Software: version 5.2 only

Published 2000-12-11. Last modified 2026-09-23.