Multiple T-Mobile customers took to X (formerly Twitter) this morning to report that they were able to see other users’ account data. The data included current credit balance, purchase history, credit card information and home address.
Earlier this morning, T-Mobile’s Help account on X said it was investigating the issue and told users to send direct messages in the meantime. The carrier also posted in its subreddit and told customers not to post anymore information as to not “exacerbate the issue.”
T-Mobile said it has fixed the issue, but noted that this wasn’t a result of an outside attack.
“There was no cyberattack or breach at T-Mobile,” T-Mobile said in a statement. “This was a temporary system glitch related to a planned overnight technology update involving limited account information for fewer than 100 customers, which was quickly resolved.
This isn’t the first time T-Mobile has struggled with protecting the personal data of its users. The company has suffered from a string of security breaches, having disclosed around 10 since 2009.
There were two just this year.
In May, T-Mobile disclosed that 836 customers were affected in a security breach. The carrier said its systems had detected that a bad actor had accessed limited information from a small number of T-Mobile accounts. While account PINs were compromised, T-Mobile said account information and call records were not affected. The company reset account PINs and offered free credit monitoring and identity theft detection via Transunion myTrueIdentity for the next two years.
In January, T-Mobile said “a threat actor stole the personal information of 37 million current postpaid and prepaid customer accounts through one of its Application Programming Interfaces” and that the breach had been ongoing since late November 2022. T-Mobile recommended that customers review their account information, update their PINs, change passwords, and monitor all account activity, including their credit reports. The company advises setting up fraud alerts with all three major credit bureaus and placing a freeze on their credit file.
Editor’s note: This story has been updated to reflect T-Mobile’s statement that the issue has been resolved.
Kayla Wassell contributed to this story.