Reminder: China-backed crews compromised 'multiple' US telcos in 'significant cyber espionage campaign'

The FBI and CISA confirmed a broad China-linked cyber espionage campaign (commonly labeled Salt Typhoon) that penetrated multiple U.S. telecom networks—including Verizon, AT&T, Lumen, and reportedly T‑Mobile—resulting in theft of customer call records, compromise of wiretapping systems used for court-ordered surveillance, and exposure of private communications for a limited set of individuals; U.S. agencies are providing technical assistance and urging potential victims to contact the FBI or CISA, while related activity by another group (Volt Typhoon) is also noted.