Three months after reports surfaced about a cyberattack, called Salt Typhoon, targeting internet service providers and US wiretapping infrastructure, two of the largest telecom companies say they've made progress securing their networks against the threat.

U.S. telecom giants AT&T and Verizon say they have secured their networks after being targeted by the China-linked Salt Typhoon cyberespionage

AT&T blamed China for the hack. Verizon said a 'small number of high-profile customers in government and politics were specifically targeted' by a nation-state threat actor.

This is the first time AT&T and Verizon have publicly acknowledged being affected by Salt Typhoon. For most customers, there’s little reason to worry. Verizon told TechCrunch that the hacking group behind the breach had targeted "a small number of high-profile customers in government." Still, the full scope of the breach remains unclear.

The Chinese-linked Salt Typhoon cyberespionage operation targeted AT&T and Verizon's systems, but the wireless carriers' U.S. networks are now secure as they work with law enforcement and government officials,

Chinese hackers called Salt Typhoon have infiltrated a ninth telecommunications firm, gaining access to information about millions of people, U.S. cybersecurity officials say.

Even in a year of high-profile Chinese cyberattacks, the Salt Typhoon campaign has stood out.

AT&T Inc. acknowledged that it had been hit by the China-linked Salt Typhoon hacking operation but that its networks were now clear from the intrusion.