The TalkTalk Telecom Data Breach of 2025

TalkTalk 2025 breach via vendor Ascendon exposed contact data and PINs, underscoring third-party risk and plaintext credential failures.

Oct 02, 2025

∙ Paid

In mid-January 2025, a hacker using the alias “b0nd” claimed on BreachForums to have stolen a large TalkTalk customer dataset. TalkTalk, a major British telecommunications provider that offers broadband, mobile, and pay-TV services, confirmed an investigation and said the incident stemmed from a third-party system, CSG Ltd.’s Ascendon subscription-manag…

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