Leading U.S. cybersecurity agencies on Tuesday said that Chinese hackers likely still have access to critical telecommunications systems, and published guidance to help engineers and network defenders identify and remove the threat actors. In a call with reporters, senior officials at the Cybersecurity and Infrastructure Security Agency (CISA) and the FBI said the agencies have been investigating the incident since late spring, and have uncovered an expansive campaign that some lawmakers are calling the worst telecom hack in the nation’s history.
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