According to the US telecom behemoth, passcode data, social security numbers, and Millions addresses were made public on the dark web.
Although AT&T stated it had not found any proof that the data had been taken, it had still hired cybersecurity specialists to look into the matter. The business declared to have reset its clients’ passcodes. The company advised them to “remain vigilant by monitoring account activity and credit reports”.
The compromised data seems to have originated in 2019 or earlier, and it pertains to 7.6 million active users and 65.4 million past account holders.
It was unclear from the company’s announcement if the data came from its systems or through a third-party provider.
One of the biggest suppliers of mobile and internet services in the US, AT&T’s wireless 5G network serves about 290 million people nationwide. Tens of thousands of phone customers were disrupted by a significant outage in February, which prompted an apology from the company and an offer of $5 credit for anyone impacted.
Prosecutors in New York investigated that episode, which caused people to be unable to use their phones for around 12 hours.
