"AT&T Says Data on 73 Million Customers Leaked on Dark Web"

AT&T recently announced that data on roughly 73 million current and former customers was exposed on the dark web, including social security numbers and other personal information.  According to the company, the data set appears to be from 2019 or earlier, impacting approximately 7.6 million current AT&T account holders and approximately 65.4 million former account holders.  The source of the data is still being assessed.  The company said a “robust investigation” is underway, supported by internal and external cybersecurity teams.  Currently, AT&T does not have evidence of unauthorized access to its systems resulting in exfiltration of the data set.  The company says the incident has not had a material impact on its operations.  In March 2023, AT&T notified roughly 9 million wireless customers that their customer proprietary network information (CPNI) was compromised in a data breach at a third-party vendor.

SecurityWeek reports: "AT&T Says Data on 73 Million Customers Leaked on Dark Web"