https://www.att.com/support/article/my-account/000102979
What happened
We learned that AT&T customer data was illegally downloaded from our workspace on a third-party cloud platform. We started an investigation and engaged leading cybersecurity experts to help us determine the nature and scope of the issue. We have confirmed the access point has been secured.Our investigation found that the downloaded data included phone call and text message records of nearly all of AT&T cellular customers from May 1, 2022 to October 31, 2022 as well as on January 2, 2023. …
The call and text records identify the phone numbers with which an AT&T number interacted during this period, including AT&T landline (home phone) customers. It also included counts of those calls or texts and total call durations for specific days or months.
We’ll notify current and former customers if their information was involved…