Security Experts:

Connect with us

Hi, what are you looking for?

SecurityWeekSecurityWeek

Cybercrime

T-Mobile Notifying Customers of Data Breach

Wireless carrier T-Mobile is sending notifications to its customers to inform them of a data breach that resulted in some of their personal information being compromised.

Wireless carrier T-Mobile is sending notifications to its customers to inform them of a data breach that resulted in some of their personal information being compromised.

The incident, the company says, was a sophisticated, malicious attack that targeted its email vendor. As part of the assault, unknown adversaries gained unauthorized access to the email accounts of some T-Mobile employees.

Because some of these accounts contained account information for T-Mobile customers and employees, the attack essentially resulted in that data being accessed by a third-party.

Customer data that appears to have been compromised in the incident includes names and addresses, phone numbers, account numbers, rate plans and features, and billing information.

According to the wireless carrier, no financial information (such as credit card details) or Social Security numbers were affected by this data breach.

“An investigation was immediately commenced, with assistance from leading cybersecurity forensics experts, to determine what happened and what information was affected. We immediately reported this matter to federal law enforcement and are actively cooperating in their investigation,” the notification reads.

The company also says it has no evidence that the exposed information “has been used to commit fraud or otherwise misused,” but encourages users to update the PIN or passcode on their T-Mobile account.

Some of the affected individuals, the carrier says, might not receive a notification, either because of outdated contact information or because that person is no longer a T-Mobile customer. The company encourages those who believe they might have been affected to contact Customer Care for additional information and assistance.

T-Mobile says the attack was identified and shut down by its cyber-security team recently, but does not provide a specific timeframe for when that happened, nor does it reveal details on how many of its customers might have been impacted.

SecurityWeek has contacted T-Mobile via email for additional clarifications on the incident and will update the article as soon as a reply arrives.

Related: Slickwraps Discloses Data Breach

Related: U.S. Combat Support Agency Discloses 2019 Data Breach

Written By

Ionut Arghire is an international correspondent for SecurityWeek.

Click to comment

Expert Insights

Related Content

Cybercrime

Zendesk is informing customers about a data breach that started with an SMS phishing campaign targeting the company’s employees.

Cybercrime

The release of OpenAI’s ChatGPT in late 2022 has demonstrated the potential of AI for both good and bad.

Data Breaches

GoTo said an unidentified threat actor stole encrypted backups and an encryption key for a portion of that data during a 2022 breach.

Cybercrime

A new study by McAfee and the Center for Strategic and International Studies (CSIS) named a staggering figure as the true annual cost of...

Cybercrime

The FBI dismantled the network of the prolific Hive ransomware gang and seized infrastructure in Los Angeles that was used for the operation.

Mobile & Wireless

Technical details published for an Arm Mali GPU flaw leading to arbitrary kernel code execution and root on Pixel 6.

Mobile & Wireless

Apple rolled out iOS 16.3 and macOS Ventura 13.2 to cover serious security vulnerabilities.

Mobile & Wireless

Apple’s iOS 12.5.7 update patches CVE-2022-42856, an actively exploited vulnerability, in old iPhones and iPads.