An AT&T store in New York. The telecommunications company said Saturday that a data breach has compromised the information tied to 7.6 million current customers. Richard Drew/AP hide caption toggle caption Richard Drew/AP Technology Millions of customers' data found on dark web in latest AT&T data breach March 30, 2024 The provider says it has reset the passcodes of the current account holders whose data was compromised as it investigates the leak, the latest in a string of telecommunications company data breaches.