Japanese telecommunication services provider NTT Communications Corporation (NTT) is warning almost 18,000 corporate customers that their information was compromised during a cybersecurity incident.
The data breach was discovered in early February 2025, but the exact date when the hackers gained initial access to NTT’s systems hasn’t been determined.
“NTT Communications Corporation discovered on February 5 that our facilities had been subjected to unauthorized access,” reads the announcement.
“On February 6, we confirmed that some information might have been leaked externally.”
Specifically, NTT says hackers breached its ‘Order Information Distribution System,’ which held details on 17,891 corporate customers (companies), but no data on personal customers (consumers).
The types of data that may have been stolen by hackers includes:
- Customer name (registered contract name)
- Customer representative’s name
- Contract number
- Phone number
- Email address
- Physical address
- Service usage information
NTT says contracts for corporate smartphones and mobile phones provided directly by NTT Docomo were not affected by this incident.
Source: Bleeping Computer