Eurofiber France disclosed a data breach it found late final week when hackers gained entry to its ticket administration system by exploiting a vulnerability and exfiltrated data.
Eurofiber France SAS is the French unit of the Eurofiber Group N.V., a Dutch telecommunications service supplier that operates a fiber community of 76,000 km throughout the Netherlands, Belgium, France, and Germany.
The corporate focuses on offering digital infrastructure for companies, slightly than the patron market.
No important information impacted
The cybersecurity incident impacts solely the French division of the group, the corporate says within the announcement, together with its cloud division (ATE portal) and its regional Eurafibre, FullSave, Netiwan, and Avelia sub-brands.
In a press launch, the corporate states that the influence is minimal for oblique gross sales and wholesale companions in France, as most of them depend on separate methods.
“Within the first hours following detection, the ticketing platform and the ATE portal have been positioned underneath enhanced security, and the vulnerability was patched,” mentions Eurofiber France.
“Further measures have been applied to forestall any additional information leaks and strengthen system security.”
Though the corporate mentioned that banking particulars or different “important information” saved on its different methods weren’t affected by this incident, it didn’t specify precisely what kinds of information have been stolen, solely mentioning that it might notify affected prospects.
Menace actor claims breach
BleepingComputer discovered {that a} risk actor calling themselves ‘ByteToBreach’ claimed the assault on a knowledge leak discussion board, alleging that they stole information belonging to 10,000 companies and even authorities entities, all shoppers of Eurofiber.
The risk actor claims to be holding information that the shoppers uploaded to the ticketing system, together with screenshots, VPN configuration information, credentials, supply code, certificates, archives, e-mail accounts as information, and SQL backup information.
Supply: BleepingComputer
BleepingComputer has contacted Eurofiber France for clarification in regards to the allegations, kinds of information uncovered within the incident, the variety of prospects impacted, and the identify of the breached software program, however we’re nonetheless ready for the corporate to reply.
Eurofiber France mentioned it has notified the French information safety company (CNIL) in addition to ANSSI – the nation’s cybersecurity company, and filed a report for extortion, indicating that the risk actor has demanded fee to not leak the stolen information.
Final August, one other French telecommunications service supplier, Bouygues Telecom, suffered a data breach that uncovered the non-public information of 6.4 million prospects.
Earlier, in July 2025, Orange France disclosed a cybersecurity breach on its community, although it has not confirmed information theft as of but.
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