Eurofiber France just lately found a critical safety incident that affected its ticket administration platform and buyer portal techniques.
On November 13, 2025, hackers exploited a software program vulnerability within the platform utilized by Eurofiber France and its regional manufacturers, together with Eurafibre, FullSave, Netiwan, and Avelia.
The assault additionally focused the ATE buyer portal, which serves the corporate’s cloud division working below the Eurofiber Cloud Infra France model.
By this exploit, the attackers managed to steal buyer information from these platforms.
The breach remained restricted to Eurofiber France clients and didn’t unfold to different Eurofiber entities working in Belgium, Germany, or the Netherlands.
The corporate instantly took motion after detecting the intrusion. Inside the first few hours, the ticketing platform and ATE portal have been secured with stronger protections, and the exploited vulnerability was patched to stop additional unauthorized entry.
Luckily, delicate info like banking particulars remained secure, as these have been saved in separate techniques that the attackers couldn’t attain.
Safety analysts at Eurofiber recognized the breach shortly and activated their incident response procedures. The corporate labored alongside cybersecurity specialists to include the injury and safe affected techniques.
Providers continued working usually all through the assault, that means clients skilled no downtime or service interruptions regardless of the continued breach.
Eurofiber France adopted all authorized necessities by reporting the incident to French authorities. The corporate filed studies with CNIL, which is the French Knowledge Safety Authority that enforces GDPR rules, and notified ANSSI, France’s Nationwide Cybersecurity Company.
Moreover, Eurofiber filed a criticism for extortion, suggesting the attackers might have tried to demand fee or threaten additional motion.
Technical Response and Platform Safety
The assault vector concerned exploiting a software program vulnerability inside the ticket administration platform infrastructure.
Such a vulnerability allowed the malicious actor to realize unauthorized entry to the system and extract information with out correct authentication.
The particular vulnerability sort was not disclosed, however the platform’s structure enabled the attacker to bypass regular safety controls.
After detection, the safety crew carried out enhanced monitoring and entry controls throughout each the ticketing platform and ATE portal.
These measures included stronger authentication mechanisms, improved logging capabilities, and extra community segmentation to stop lateral motion inside the infrastructure.
The fast patching response demonstrates the significance of getting incident response procedures able to deploy when safety incidents happen.
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