Cisco_FTD_SSP_Upgrade-6.6.1-91.sh.REL.tar Cisco Secure Firepower Threat Defense 6.6.1-91 Security Upgrade Package Download Link
Introduction to “Cisco_FTD_SSP_Upgrade-6.6.1-91.sh.REL.tar” Software The Cisco_FTD_SSP_Upgrade-6.6.1-91.sh.REL.tar is a critical security maintenance release for Cisco Firepower 2100/4100/9300 Series appliances running Firepower Threat Defense (FTD) 6.6.1. This upgrade package addresses multiple vulnerabilities identified in Cisco’s Q2 2025 security advisories while maintaining compatibility...

