New problems for the wireless carrier T-Mobile that disclosed a data breach that exposed some of the customers’ personal information.

The wireless carrier T-Mobile was victims of a sophisticated cyber attack that targeted its email vendor.

A data breach notification published by the telecommunications giant on its website revealed that the security breach impacted both employees and customers.

“Our Cybersecurity team recently identified and shut down a malicious attack against our email vendor that led to unauthorized access to certain T-Mobile employee email accounts, some of which contained account information for T-Mobile customers and employees.” reads the data breach notification.

The company has immediately launched an investigation with the help of leading forensics experts, it already reported the incident to federal law enforcement.

Exposed data included customer names and addresses, phone numbers, account numbers, rate plans and features, and billing information, fortunately, financial information (including credit card data) and Social Security number were not impacted.

T-Mobile confirmed that some of these accounts accessed by the hackers contained account information for its customers and employees.

The company declared that it is not aware of abuses of the exposed information.

“We are not aware of any evidence where the information contained in the affected email accounts has been used to commit fraud or otherwise misused.” continues the notice.

Customers who believe they might have been impacted by the data breach could contact Customer Care for additional information and assistance.

T-Mobile was able to identify the intrusion and shut down the unauthorized access.

At the time of writing the company did not provide details on the attack, including the timeframe for it took place and the number of impacted customers.

In November 2019, the US branch of the telecommunications giant disclosed another security breach that according to the company impacted a small number of customers of its prepaid service.

Pierluigi Paganini