T-Mobile, the largest wireless provider in the United States, announced Monday that it is investigating a cybersecurity incident and has discovered that unauthorized access to “some” of its data has occurred.
While a breach did occur, the carrier stated in a cybersecurity update that “we have not yet determined that there is any personal customer data implicated.”
T-Mobile was examining offers made on an underground site by someone claiming to be selling massive amounts of data supposedly taken from the network, according to a Vice News report published Sunday.
The vendor told the publication that they had illegally obtained data from T-Mobile servers that included Social Security numbers, phone numbers, names, physical addresses, unique International Mobile Equipment Identity numbers, and driver license information for more than 100 million people.
With 104.8 million users as of the end of the second quarter of this year, T-Mobile is the second-largest wireless carrier in the United States.
The corporation stated in its update that it was unable to verify the truth of the published allegations.
“We are confident that the entry point used to gain access has been closed, and we are continuing our deep technical review of the situation across our systems to identify the nature of any data that was illegally accessed,” it said.
“This investigation will take some time but we are working with the highest degree of urgency. Until we have completed this assessment we cannot confirm the reported number of records affected or the validity of statements made by others.”
Company officials said they are “working around the clock” to investigate the claims.
“We take the protection of our customers very seriously and we are conducting an extensive analysis alongside digital forensic experts to understand the validity of these claims, and we are coordinating with law enforcement,” they added.