Bouygues Telecom, one of France’s leading telecommunications providers, has announced a significant data breach affecting the personal information of approximately 6.4 million customers. The breach was confirmed following a cyberattack that took place on Sunday, August 4, 2025, raising concerns about the security of customer data.
In a press statement, Bouygues Telecom detailed that the unauthorized access to this sensitive information prompted immediate internal investigations, revealing that a known cybercriminal group had specifically targeted the company’s internal resources. Despite the breach, the company emphasized that there has been no impact on its customer services or network operations.
According to their FAQ, the compromised data includes contact details, contract information, civil status data, company information for business customers, and International Bank Account Numbers (IBANs). However, Bouygues Telecom confirmed that credit card numbers and account passwords were not part of the stolen information.
As a precautionary measure, Bouygues Telecom has taken swift action to block the attackers’ access to its network and has ramped up monitoring and security protocols. Customers are being alerted to the breach through SMS and email, but the exposure of their information has heightened the risk of potential fraud and phishing attempts. The company has advised its users not to divulge their credentials to callers attempting to gain their trust through personal information.
The firm has contacted the French National Cybersecurity Agency (ANSSI) and the CNIL, highlighting the legal ramifications that the attackers could face, including a five-year imprisonment term and a €150,000 fine. This breach follows closely on the heels of another reported attack on the French telecom giant, Orange, which experienced a similar incident on July 25, 2025, suggesting a troubling trend of cyber threats targeting European telecom providers.