"Data breach at French telecom giant Bouygues affects millions of customers", August 7, 2025

Bouygues Telecom, the third-largest phone carrier in France, has confirmed a cyberattack and data breach affecting millions of its customers.

In a statement posted to its website, the telecommunications giant said the hack allowed the intruders to access the personal information on 6.4 million customer accounts. Bouygues said it detected the cyberattack on August 4, but did not give a time frame for when the breach was remediated.

In a separate page dedicated to victims of the cyberattack, Bouygues said the stolen data includes customers’ contact information and contractual data, their civil status (or company data if the subscriber is a professional), as well as IBANs, or international bank account numbers.

Bouygues said it has about 26.9 million mobile customers.

The cyberattack has been reported to France’s data protection agency, CNIL.

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A spokesperson for Bouygues did not immediately respond to a request for comment asking for details about the cyberattack, or explain why the page was hidden from search engines.