Millions of AT&T customers have been notified of a data breach at a third-party vendor

target="_blank" rel="nofollow noopener noreferrer"

US mobile phone operator AT&T is notifying millions of wireless customers that its customer network information (CPNI) was compromised in a data breach at a third-party vendor.

One of the largest carriers in the US, AT&T, has roughly 200 million wireless customers, but only a small percentage of the total was affected by the incident. “Approximately 9 million wireless accounts had access to customer proprietary network information,” AT&T said in an emailed statement.

The vendor in question, AT&T, told SecurityWeek, it provides marketing services. The data breach did not affect any personal or financial data.

Read more: Millions of AT&T Customers Notified of Data Breach at Third-Party Vendor

For more such updates follow us on Google News ITsecuritywire News. Please subscribe to our Newsletter for more updates.