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State-Sponsored UAT-4356 Deploys FIRESTARTER Backdoor on Cisco Firepower Devices via Chained N-Day Vulnerabilities
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State-Sponsored UAT-4356 Deploys FIRESTARTER Backdoor on Cisco Firepower Devices via Chained N-Day Vulnerabilities

26 April 2026 dark6

Cisco Talos has uncovered an active espionage campaign by state-sponsored group UAT-4356, which chains two Cisco Firepower FXOS vulnerabilities (CVE-2025-20333...