Eurofiber Data Breach
Status: Confirmed
Breach Intelligence Summary
Entity: Eurofiber · Actor: Unknown · Source: Have I Been Pwned / ObscureIQ intelligence
Attack: Credential Compromise via Under investigation
Timeline: Breach (Nov, 2025) · Reported (Nov, 2025) · Leak (11/20/25)
Exposure: 10K+ records · Email, Names, Phone numbers
Status: Confirmed · Risk: Low (Phishing / SIM swap)
Summary
In November 2025 Eurofiber France disclosed a data breach of its ticket management platform. Data containing 10k unique email addresses and a smaller number of names and phone numbers was subsequently leaked. 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.
About Eurofiber
Eurofiber is the organization affected by this breach. User data may have been generated through account creation, service usage, or business operations.
If you have interacted with Eurofiber in any capacity, your data may be included in this breach.
Threat Actor: Unknown
The threat actor responsible for this breach has not been publicly identified or confirmed at this time.
- Under investigation
Breach Exploitation Status
Low
Status
Unknown
Possible
Unknown
Unknown
Unknown
1–3 years
Email addresses and usernames persist but credentials may rotate. Phishing risk remains elevated during this window.
Data Points Exposed
Dark Web Verification
Status: Confirmed
- Dataset containing approximately 10K+ records has been identified in breach intelligence sources.
- The data is indexed and searchable across breach notification platforms.
Impact
This breach carries low risk due to the nature of exposed data fields and the scale of affected records.
- Targeted phishing referencing Eurofiber accounts or services
- SIM-swap attempts where phone numbers are present
- Data broker enrichment and resale
Recommendations for Impacted Individuals
If you believe your information may be included:
Non-clients may request a breach impact review.
Eurofiber account updates
Password reset requests
Verify directly through official channels.
Email compromise is often the first pivot point.
Frequently Asked Questions
In Nov, 2025, Eurofiber experienced a data breach that resulted in the exposure of approximately 10K+ records containing personal information.
The exposed data includes Email, Names, Phone numbers.
Approximately 10K+ records were affected based on current breach intelligence.
Yes. This breach is treated as confirmed based on data observed in breach intelligence platforms.
Data circulation has been reported across breach-sharing channels. Downstream exploitation risk exists based on the nature of the exposed fields.
Rotate passwords associated with Eurofiber, enable multi-factor authentication on email and financial accounts, and monitor for suspicious activity.
Protect Yourself
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Corporate Accountability
Organizations that collect personal data have a duty to implement reasonable safeguards and to notify affected individuals when breaches occur.
Scope assessments may evolve as investigations continue. Users should not rely solely on early estimates when making risk decisions.
ObscureIQ Advisory
We combine proprietary dark web access with commercial and restricted breach intelligence to verify exposure and assess real-world risk.
- A public-facing individual
- A high-profile executive
- A customer of Eurofiber
- Or simply concerned about credential reuse
We can confirm whether your information is circulating and evaluate downstream threat vectors.