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A huge chunk of AT&T customer data, including Social Security numbers and encrypted passcodes, was leaked online in March. AT&T was forced to reset millions of customer passwords.

Passcodes Deciphered

A security researcher analyzed the leaked data and found that the passcodes were “easy to decipher.” AT&T says there’s no evidence of anyone using the data to access customer accounts yet.

Data from 2019 or Earlier

AT&T says the leaked data appears to be from 2019 or earlier. It affected approximately 7.6 million current account holders and 65.4 million former account holders.

Possible Class Action Lawsuits

Cybersecurity researcher Troy Hunt believes the leak may be linked to a 2021 data breach that AT&T never acknowledged. If AT&T “made the wrong call” and didn’t notify affected customers, the company could face class action lawsuits.

Customer Safety Tips

AT&T encourages customers to:

  • Monitor account activity and credit reports
  • Set up free fraud alerts from credit bureaus (Equifax, Experian, TransUnion)