T-Mobile data breach exposes about 37 mln accounts

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20 Jan. (Reuters) – US mobile carrier T-Mobile (TMUS.O) said on Thursday it was investigating a data breach that potentially exposed 37 million postpaid and prepaid accounts, hinting that the incident involved significant costs .

It is the second major cyberattack in less than two years and comes months after the carrier agreed to boost its data security to settle a lawsuit related to a 2021 incident that compromised information of an estimated 76.6 million people. brought.

The company identified malicious activity on Jan. 5 and contained it within a day, it said, adding that no sensitive data such as financial information was disclosed.

However, T-Mobile added that basic customer data – such as name, billing address, email address and phone number – had been breached and it had begun to notify affected customers. The company has more than 110 million subscribers.

A spokesperson for the US Federal Communications Commission (FCC) said the regulator had opened an investigation into the incident.

“Carriers have a unique responsibility to protect customer information. If they fail to do so, we will hold them accountable. This incident is the latest in a series of data breaches at the company and the FCC is investigating,” the spokesperson said.

T-Mobile declined to comment on the investigation. Shares of the company fell 1% in Friday morning trading.

News of the incident also provoked sharp reactions from analysts.

“While these cybersecurity breaches may not be systematic in nature, their frequency at T-Mobile is an alarming outlier compared to telecom peers,” said Neil Mack, senior analyst at Moody’s Investors Service.

“It could negatively impact customer behavior, increase customer churn and potentially attract the attention of the FCC and other regulators.”

Reporting by Eva Mathews and Lavanya Ahire in Bengaluru; Additional reporting by Akanksha Khushi; Edited by Rashmi Aich, Savio D’Souza and Anil D;Silva

Our Standards: The Thomson Reuters Principles of Trust.

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