T-Mobile US admitted a data breach on Monday but said it had not yet been found out if customer information was compromised a day after an online forum alleged personal information of more than 100 million of its users was leaked.
The telecom operator said in a blog post that it was confident that the access point to access the data had been closed. The number of affected records was not confirmed.
“We are doing a thorough analysis with digital forensics experts to understand the validity of these claims and are coordinating with law enforcement agencies,” the company said.
We worked around the clock to investigate allegations that T-Mobile data may have been accessed illegally. We take the protection of our customers very seriously and, together with experts in digital forensics, conduct a comprehensive analysis to understand the validity of these claims and coordinate with law enforcement agencies.
We have determined that there has been unauthorized access to some of T-Mobile’s data, but we have not yet determined that it is personal customer data. We are confident that the access point has been closed to access and we are continuing our in-depth technical review of the situation in our systems to identify the type of data that has been illegally accessed. This investigation will take some time, but we are working with the utmost urgency. Until we have completed this assessment, we cannot confirm the reported number of affected records or the validity of the statements of others.
We understand that customers will have questions and concerns, and resolving them is critical to us. Once we have a more complete and verified understanding of what happened, we will proactively communicate with our customers and other stakeholders.
US-based digital media company Vice first reported allegations of a data breach on Sunday.
According to the report in Vice’s Motherboard, the forum’s post doesn’t mention T-Mobile, but the hacker told Vice that they got data from over 100 million people and that the data came from T-Mobile servers.
In the afternoon trading, the T-Mobile share lost 2.8 percent.
© Thomson Reuters 2021