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Eurofiber cybersecurity incidents and threat signals
eurofiber.com
This company page brings together public reporting currently associated with Eurofiber. It reflects signals published by Shadow Tier and should not be read as a complete incident history.
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June 25, 2026
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Based on all published signals currently linked to Eurofiber. Affected countries come from victim data; the company country above remains a separate profile fact. Counts describe this reporting set, not overall incident prevalence.
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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. 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.
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Questions about Eurofiber cybersecurity reporting
What does the Eurofiber page include?
It combines a reviewed organization profile with all current published Shadow Tier signals explicitly linked to Eurofiber.
Does every mention of Eurofiber appear here?
No. A signal must contain a reliable company connection and meet the publication criteria; incidental or ambiguous mentions are excluded.
Why can the incident count change?
The page follows current published reporting. Counts change as new evidence is added, classifications are reviewed, or older signals leave the reporting window.