CVE-2002-1463: Symantec Enterprise Firewall

High severity, CVSS 7.5. EPSS: 6.9% chance of exploitation in the next 30 days.

Symantec Raptor Firewall 6.5 and 6.5.3, Enterprise Firewall 6.5.2 and 7.0, VelociRaptor Models 500/700/1000 and 1100/1200/1300, and Gateway Security 5110/5200/5300 generate easily predictable initial sequence numbers (ISN), which allows remote attackers to spoof connections.

Affected products

• Symantec Enterprise Firewall: version 6.5.2 only; version 7.0 only
• Symantec Gateway Security: version 5110 only; version 5200 only; version 5300 only
• Symantec Raptor Firewall: version 6.5 only; version 6.5.3 only
• Symantec Velociraptor: version model_500 only; version model_700 only; version model_1000 only; version model_1100 only; version model_1200 only; version model_1300 only

Published 2003-06-09. Last modified 2026-06-16.