AT&T now says data breach impacted 51 million customers

AT&T confirmed that a dataset first offered for sale in 2021 and later leaked publicly contained sensitive personal information for approximately 51.2 million customers (data appears to be from June 2019 or earlier), including names, contact details, SSNs, account numbers and passcodes; the company has notified affected individuals, offered one year of identity protection, and faces lawsuits over delayed disclosure while the dataset circulates among cybercriminals, increasing risks of identity theft and targeted attacks.