Bouygues Telecom warns it suffered a data breach after the personal information of 6.4 million customers was exposed in a cyberattack.
The company is one of the largest telecommunication service providers in France, offering mobile, internet, and IPTV services. Bouygues Telecom has 14.5 million mobile subscribers, 9,000 employees, and an annual revenue of €56.8 billion ($66B).
Bouygues Telecom confirmed in a FAQ and a press statement that the attack occurred last Sunday, August 4, 2025.
Although Bouygues Telecom says that there has been no impact observed on customer services or networks, the personal data of 6.4 million customers was compromised.
"Bouygues Telecom was the victim of a cyberattack that allowed unauthorized access to certain personal data from 6.4 million customer account," reads the translated press statement.
"The situation was resolved as quickly as possible by Bouygues Telecom's technical teams, and all necessary additional measures have been implemented."
A previous statement says that internal investigations confirmed that the attack was orchestrated by a 'known cybercriminal group' that targeted 'specific internal resources.'
The firm informed the French National Cybersecurity Agency (ANSSI) and the CNIL (French data protection authority) accordingly, noting that the perpetrator could face up to 5 years of imprisonment and a €150,000 fine for this attack.
According to the FAQ, the following customer information was stolen:
Contact details
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