TalkTalk investigates ‘customer data breach’ after hacker puts private details for sale online
TalkTalk investigates ‘customer data breach’ after hacker puts private details for sale online
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TALKTALK has launched an investigation into a third-party data breach, after a hacker allegedly put nearly 19million customers' details for sale online. A statement from a hacker known as "b0nd" claimed they were selling data obtained in a breach in January 2025.
![[Silhouette of a teenage boy using a laptop.]](https://www.thesun.co.uk/wp-content/uploads/2025/01/photo-showing-teenage-boy-hacker-278837658.jpg?strip=all&w=960)
"As the title says today we will list for sale a large data breach involving TalkTalk," b0nd's post on a hacker forum read. "This breach took place January 2025 and affects 18,839,551 current and previous customers.". In a statement, TalkTalk said that no billing or financial information was at risk.
"As part of our regular security monitoring, given our ongoing focus on protecting customers' personal data, we were made aware of unexpected access to, and misuse of, one of our third-party supplier's systems, however, no billing or financial information was stored on this system," a TalkTalk spokesperson said.
"Our investigations are ongoing, however we can confirm that the number of potential customers referred to in certain online posts is wholly inaccurate and very significantly overstated.". Although, the hacker claimed that customers' names, emails, last-used IP address, business phone number and home phone number had been exposed.
TalkTalk is currently working with the third-party, believed to be subscription management platform CSG Ascendon. Screenshots shared by the hacker suggest the data was possibly stolen from Ascendon, rather than directly from TalkTalk. TalkTalk has historically used CSG Ascendon's services.
