The telecom giant said in a filing with the U.S. Securities and Exchange Commission it learned in April that customer data was illegally downloaded "from our workspace on a third-party cloud platform."
According to the company, the compromised data includes files containing AT&T records of calls and texts of nearly all of AT&T's cellular customers, customers of mobile virtual network operators (MVNOs) using AT&T's wireless network, as well as AT&T landline customers who interacted with those cellular numbers between May 1, 2022, and Oct. 31, 2022.
The company said the compromised data also includes records from Jan. 2, 2023, for a "very small number of customers."
"The data does not contain the content of calls or texts, personal information such as Social Security numbers, dates of birth, or other personally identifiable information," the news release reads. "It also does not include some typical information you see in your usage details, such as the time stamp of calls or texts.
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