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MA
HIGH
Malware
Firestarter Malware Persists on Cisco Firewalls Post-Update
U.S. and U.K. agencies warn about Firestarter malware exhibiting post-update persistence on Cisco Firepower and Secure Firewalls running ASA/FTD.
Runtime Rebel Intel
4 min read·Apr 25, 2026
MA
CRITICAL
Malware
FIRESTARTER Backdoor: Persistent Threat to Cisco Firepower & Secure Firewall
CISA and NCSC warn of FIRESTARTER, an APT-deployed backdoor maintaining persistence on Cisco Firepower and Secure Firewall devices post-patching.
Runtime Rebel Intel
6 min read·Apr 23, 2026