T-Mobile has announced a data breach exposing customers’ proprietary network information (CPNI), including phone numbers and call records.
Starting yesterday, T-Mobile began texting customers that a “security incident” exposed their account’s information.
According to T-Mobile, its security team recently discovered “malicious, unauthorized access” to their systems. After bringing in a cybersecurity firm to perform an investigation, T-Mobile found that threat actors gained access to the telecommunications information generated by customers, known as CPNI.
Source: Bleeping Computer