The Salt Typhoon hack is one of the largest attacks on US telecommunications ever, officials say. The yearslong attack originated in China and targeted major telecom companies like AT&T and Verizon.

WASHINGTON—U.S. officials are racing to understand the full scope of a China-linked hack of major U.S. broadband providers, as concerns mount from members of Congress that the breach could amount to a ...

China-linked hackers who broke into global telecommunications systems likely exploited a seven-year-old bug in Cisco’s router software and used stolen credentials to gain access to systems, the ...