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Stories cluster related articles into a single narrative, linked to the underlying CVEs and affected products. 3,726 stories synthesized.

breach1 source · 2 CVEs

UAT-4356's FIRESTARTER Backdoor Targets Cisco Firepower Devices via N-Day Exploits

Cisco Talos has identified that threat actor UAT-4356 is actively exploiting n-day vulnerabilities in Cisco Firepower FXOS devices to deploy a custom backdoor named FIRESTARTER, which achieves persistence through CSP_MOUNT_LIST manipulation and executes arbitrary shellcode within the LINA process.

Apr 23, 2026 · updated May 18, 2026