Hacker claims 2.3TB data stolen from Italian IT provider Almaviva
A hacker group, ByteToBreach, claimed to have breached Almaviva, a major Italian IT services provider, and stolen 2.3 terabytes of internal corporate data. The leaked data reportedly includes confidential documents, HR data, contracts with public entities, and accounting data. Almaviva confirmed the cyberattack and data theft, stating that critical services remained operational. The breach also impacted data related to its client, the Italian national railway operator FS Italiane Group.
Almaviva
- Domain
- almaviva.it
- Sector
- Professional, Scientific, and Technical Services
- Signals
- 1 linked
Signal context
First seen: Nov 20, 2025
Last updated: Jun 25, 2026
Status: Public signal
Key points
- Hacker group 'ByteToBreach' claimed responsibility for the breach.
- Approximately 2.3 TB of data was stolen from Almaviva's corporate systems.
- Exposed data includes confidential documents, HR archives, accounting data, and contracts with public entities.
Signal analysis
BetaThis 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.
Sector: Professional, Scientific, and Technical Services
Likely country: 🇮🇹 Italy
inferred from company domain
Watch internet-facing systems, credential abuse and exploit activity.
- Source type: outside the affected organization
Impact area: Confidentiality
- 5 signals in the same sector
- 90 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
Hacker claims to steal 2.3TB data from Italian rail group, Almaviva - Bleeping Computerhttps://www.bleepingcomputer.com/news/security/hacker-claims-to-steal-23tb-data-from-italian-rail-group-almaviva/Public source from bleepingcomputer.com.
Massive data leak hits Italian railway operator Ferrovie dello Stato via Almaviva hackhttps://securityaffairs.com/170068/data-breach/massive-data-leak-hits-italian-railway-operator-ferrovie-dello-stato-via-almaviva-hack.htmlPublic source from securityaffairs.com.
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