Following a catastrophic data breach in August, T-Mobile has been subjected to yet another hack. According to reliable sources, attackers gained access to “a small number of” customers’ accounts this time.
Customers were either victim of a SIM switching attack (which might allow someone to overcome SMS-powered two-factor verification), had personal plan information leaked, or both, as per the report. Documents showing the customer proprietary network information that was accessed might have included the billing account name, phone number, and account number, as well as information about their plan, such as how many lines were linked to their account.
This summer, the operator disclosed that a data breach exposed about 50 million customers’ personal information, with the hacker gaining access to social security numbers, names, and birth dates. (An individual claiming to be the hacker went on to describe the company’s security methods as “awful.”) The information allegedly exposed in December’s hack is less sensitive (and the docs state that consumers who had their SIMs swapped recovered access) and presumably not as extensive. We couldn’t discover any widespread complaints from consumers claiming to have received notification letters.
T-support Mobile’s account appears to have verified the breach, responding to people on Twitter with the statement that it is taking “immediate action” to assist individuals who were placed in danger by the hack.
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