Eurofiber France SAS hit by cyberattack
Incident
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The Eurofiber France SAS breach, discovered late last week, exposed information after hackers used a vulnerability to enter the company's ticket management system. The incident is confined to the French division, including the ATE portal and the Eurafibre, FullSave, Netiwan, and Avelia sub-brands, while the company said banking details and other critical data were not affected. Eurofiber patched the vulnerable system, tightened security, notified CNIL and ANSSI, and said it filed an extortion report after a threat actor claimed stolen customer data.
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Timeline
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17.11.2025 23:14 2 articles · 6mo ago
Eurofiber France discloses ticket system breach
Initial DisclosureEurofiber France SAS disclosed a data breach affecting its French division after hackers exploited a vulnerability in its ticket management system and exfiltrated information. The company said the ticketing platform and ATE portal were placed under enhanced security and the vulnerability was patched in the first hours after detection, that affected customers will be notified, and that CNIL and ANSSI were notified and an extortion report was filed after a threat actor calling itself ByteToBreach claimed stolen data from Eurofiber clients.
Show sources
- Eurofiber France warns of breach after hacker tries to sell customer data — www.bleepingcomputer.com — 17.11.2025 23:14
- Eurofiber France warns of breach after hacker tries to sell customer data — www.bleepingcomputer.com — 17.11.2025 23:14