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Hackers potentially had access to sensitive data for over 10 days
This week, Japanese telco NTT has revealed it has been the subject to a major data breach, potentially compromising the data of almost 18,000 corporate customers.
The breach was first discovered on February 5, with NTT confirming the following day that some customer information may have been exfiltrated.
Initial action was taken on February 6 to restrict access to the compromised device and, following an internal investigation, access to a second compromised device on the internal network was blocked on February 15.
For now, the extent of the impact caused by the breach is unclear.
NTT says the data of 17,891 corporate customers may have been affected, with compromised information including the customer contract number, customer name (contract name), name of customer contact, telephone number, email address, address, and information related to service use.
Corporate smartphones provided by NTT Docomo were not affected.
NTT apologised for the incident, saying it will take measures to strengthen its cybersecurity.
This is not the first cybersecurity incident to befall NTT this year, with the company having suffered a major distributed denial of service (DDoS) attack back in January.
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