UScellular has disclosed a data breach after the attack that compromised the company’s billing system in December 2021. United States Cellular Corporation, is the fourth-largest wireless carrier in the United States, with over 4.9 million customers in 426 markets in 23 states as of the second quarter of 2020.
According to the company, it discovered unauthorized access to its billing system on December 12, 2021, that resulted in the exposure of data associated with wireless customer accounts.
UScellular revealed that 405 customers were impacted by this attack, the company reset login credentials for every affected impacted and immediately changed the impacted customers’ PIN and security question/answer.
In response to the incident, the company also immediately disconnected the computer accessed by threat actors from the internet and requested immediate removal from the internet of the fraudulent websites used by the fraudsters as part of the scheme.
