When the massive trove of data was posted for sale on a cybercrime forum early this month, AT&T said it did not originate from its systems, even though the poster said it was stolen from a 2021 breach of the telecommunications giant.
AT&T says there is still no indication their systems were breached. However, the company has now confirmed that the data belongs to 7.6 million current customers and 65.4 million former customers. According to a statement, it is not yet known whether the data in those fields originated from AT&T or one of its vendors.
The reason so many former customers have been impacted is due to the data set apparently dating from 2019 or earlier.
