T-Mobile US said it has experienced a data breach which exposed certain customer data, BleepingComputer reported, citing company texts to customers about a security incident. T-Mobile US also reported the incident on its site. The report said the breach exposed customer proprietary network information (CPNI), including phone numbers and call records. The operator said the data accessed did not include names on the account, physical or email addressed, financial data, credit card information, social security numbers, tax ID, passwords or PINs.
T-Mobile US said that after discovering "malicious, unauthorized access" to its systems, it brought in a cybersecurity firm to perform an investigation. The operator told BleepingComputer that the breach affected a "small number of customers,” less than 0.2 percent. T-Mobile US has about 100 million customers, which means around 200,000 people were affected by the breach.
