Eurofiber France Data Breach

▼ Key takeaways

•Reports suggest a potential breach involving Eurofiber France.
•Discovered on November 1, 2025.
•Possible data exposed: Email addresses, Names, Phone numbers.
•Confirmation level: Confirmed by company.

Breach confirmed

The Eurofiber France breach is confirmed. If you may be affected, add your details below and we will take it from there.

Detailed summary

In November 2025, Eurofiber France disclosed a data breach affecting its ticket management platform. This breach occurred due to a vulnerability that allowed hackers to access and exfiltrate customer data, which was subsequently leaked. The company issued a public warning about the incident around mid-November 2025.

The confirmed data types exposed include 10,000 unique email addresses, as well as a smaller number of names and phone numbers. The number of affected individuals is estimated at 10,000. A threat actor has claimed to possess additional, more sensitive data, but this has not been publicly confirmed by Eurofiber France.

Details can emerge later, and notices regarding data breaches may be delayed.

Data possibly involved

Email addresses
Increases risk of phishing attacks and account takeovers
Names
Phone numbers
May be used for SIM swapping or targeted scam calls

Breach Verification Status

Reports Only

Complete

Initial dark web reports of potential breach

Company Confirmed

Current

Company has acknowledged the breach

Regulator Confirmed

Confirmed by regulatory authorities

Note: Breach verification can take time. Information may evolve as more details become available from companies and regulators.

Case Status:

Investigation Open

We're actively investigating this case and seeking affected individuals.

Were You Affected By This Breach?

If you are a customer or have received a data breach notification, you may submit your information as part of our ongoing investigation. Submitting your information is free and does not obligate you.

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Check Your Risk Level

Answer a few questions to understand how this breach might affect you

Do you use Eurofiber France?

Yes

What should I do?

Change your passwords

Update passwords for the affected service and any accounts using the same password

Enable two-factor authentication

Add an extra layer of security to your accounts

Monitor your accounts

Watch for suspicious activity on your financial and online accounts

Watch for phishing attempts

Be cautious of emails or messages claiming to be from the affected company

Consider a credit freeze

Prevent unauthorized access to your credit report

Scan your email for other exposures

Check whether this address shows up in other known breaches. Free, no account.

Get your info off data-broker sites

Data Shield files removal requests with every broker that accepts an authorized agent, and gives you the exact link or letter for the brokers that only accept requests from you.

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