Att Data Breach 2025. If you're one of at&t's cellular customers, you can check your account to see if your data was compromised as part of the massive breach the telecom giant announced on. At&t says more than 7.6 million current customers and 65 million former customers were affected by a data leak exposing social security numbers, passcodes, and.

Data compiled from leading cybersecurity analysts (stationx, it governance) and industry reports. At&t said friday the call and text message records of nearly all of its cellular customers were exposed in a data breach.