Eurofiber France Suffers Data Breach Affecting Ticket and Customer Portals
Eurofiber France, a European fiber operator, confirmed a cybersecurity incident detected on November 13, 2025.
Key points
- Cybersecurity incident detected on November 13, 2025.
- Exploited a software vulnerability in the ticket management platform and ATE customer portal.
- Affected Eurofiber France and its regional brands/subsidiaries.
Connected intelligence
Signal brief
Follow the organization, likely method and potential impact to explore connected Shadow Tier intelligence.
Organization
- Published
- Nov 13, 2025
- Updated
- Jun 25, 2026
- Confidence
- Medium
- Evidence
- 2 sources
Structured assessment
Signal analysis
This analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.
Threat source
Watch internet-facing systems, credential abuse and exploit activity.
Business impact
- Impact area
- Confidentiality
- Likely asset
- User or customer data, Server or cloud data store
Mentioned entities
Quick context
Questions about this signal
What happened in this signal?
Eurofiber France, a European fiber operator, confirmed a cybersecurity incident detected on November 13, 2025. Threat actors exploited a software vulnerability to breach its ticket management platform and the ATE customer portal, stealing data and attempting extortion. The breach primarily affected customers in France and its subsidiaries (Avelia, Eurafibre, FullSave, Netiwan, Eurofiber Cloud Infra France). Stolen data may include SSH private keys, VPN configurations, API keys, SQL backups, source code, support tickets, and internal messages.
When was this signal reported?
Shadow Tier lists Nov 13, 2025 as the signal date.
Which organization is connected to this signal?
Eurofiber is the organization connected to this public signal.
Explore EurofiberWhich impact area is relevant?
This signal is connected to data exposure and breach intelligence based on its reported consequences.
Explore data exposure and breach intelligenceRelated signals
Compare shared topics, actors and incident patterns before opening the full signal.
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