T-Mobile confirms that SIM exchange attacks caused a crash
T-Mobile has confirmed a data breach caused in part by SIM exchange attacks, according to a statement from the company.
T-Mo Report, a blog monitored by T-Mobile, received internal reports showing that some data had been leaked from a subset of customers.
Some individuals with customer property network (CPNI) information have been released, which includes information about customer plan, number of lines, phone numbers, billing account , and more. Others changed their SIMs.
Some suffered both CPNI leaks and SIM exchanges.
When pressed for comment by ZDNet, T-Mobile declined to go into detail about the attack and did not say how many customers were affected by this.
"Our people and processes have worked as designed to protect our customers from this type of fraudulent attempt that unfortunately unfortunately occurs too often in our business," he said. a T-Mobile representative in response to questions from ZDNet.
The company told CNET and Bleeping Computer that they had sent calls to "a small number of customers" who were dealing with SIM exchange attacks, calling the attacks "a common occurrence throughout the industry."
T-Mobile Producer tweeted say the company is "taking immediate steps to help protect everyone who may be at risk from this cyberattack."
The company received a major data breach in August that revealed sensitive information from more than 50 million current, existing and potential customers. This included names, addresses, social security numbers, driver licenses, and ID information.
T-Mobile users have long criticized the carrier for its underdeveloped support for SIM exchange victims. The company has re-announced SIM exchange attacks and data breaches since 2022.