The FBI and security researchers today warned that Russian government spies exploited a seven-year-old bug in end-of-life Cisco networking devices to snoop around in American critical infrastructure networks and collect information on industrial systems.

"In the past year, the FBI detected the actors collecting configuration files for thousands of networking devices associated with US entities across critical infrastructure sectors," the federal cops said . "On some vulnerable devices, the actors modified configuration files to enable unauthorized access to those devices."

Both the FBI and Cisco Talos, in separate security alerts, attributed the network intrusions to the Russian Federal Security Service's (FSB) Center 16, aka Static Tundra, Berserk Bear, and Dragonfly.

This particular c

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