TransUnion said a third-party data breach affected more than 4.4 million customers. The credit reporting agency revealed the breach in a filing with the Maine’s attorney general’s office. The company said the breach on July 28 involved unauthorized access of a third-party application that contained customers’ personal data for its U.S. consumer support operations. The incident was discovered July 30. “The information was limited to specific data elements and did not include credit reports or core credit information,” the company wrote, but did not specify what types of data were involved. In a separate data breach disclosure filed Thursday with Texas’ attorney general’s office, TransUnion said that the stolen personal information included customers’ names, birthdates and Social Security numbers.