Eurofiber - 10,003 breached accounts - IT Security News

Key Findings

• Eurofiber France disclosed a data breach of its ticket management platform in November 2025

• The breach resulted in the exposure of 10,003 unique email addresses, and a smaller number of names and phone numbers

• A threat actor claiming responsibility for the breach alleges to have additional, more sensitive data including screenshots, VPN configuration files, credentials, source code, certificates, archives, and SQL backup files

Background

In November 2025, Eurofiber France, a provider of fiber-optic network services, disclosed a data breach of its ticket management platform. The incident occurred on their customer-facing systems, compromising a database containing customer information.

Breach Details

The data breach exposed 10,003 unique email addresses, along with a smaller number of customer names and phone numbers. The threat actor responsible for the breach has claimed to possess additional, more sensitive data, including:

• Screenshots

• VPN configuration files

• Credentials

• Source code

• Certificates

• Archives

• SQL backup files

This more comprehensive data set could potentially enable further attacks or exploit sensitive information.

Impact

The exposure of customer email addresses, names, and phone numbers presents a risk of increased phishing, spam, and other targeted attacks against the affected individuals. The additional data allegedly in the hands of the threat actor could have more severe consequences, potentially leading to network infiltration, system compromise, and further data breaches.

Eurofiber's Response

Eurofiber France has acknowledged the breach and has notified affected customers. The company has stated that it is working to investigate the incident, secure its systems, and implement additional security measures to prevent similar breaches in the future.

Conclusion

The Eurofiber France data breach highlights the ongoing threat of cyber attacks targeting critical infrastructure and customer data. The exposure of sensitive information, combined with the threat actor's claims of possessing more comprehensive data, underscores the need for robust security measures and vigilance in protecting customer information.

Sources

• https://haveibeenpwned.com/Breach/Eurofiber

• https://haveibeenpwned.com/Breach/Vultr

• https://www.itsecuritynews.info/eurofiber-10003-breached-accounts/