NEC Subcontractor Suffers Cyber Attack Leading to Customer System Disruptions and Personal Data Leak
NEC has confirmed that a subcontractor responsible for system development and maintenance operations was targeted in a cyber attack, resulting in disruptions across multiple customer systems and the leakage of personal information.
According to the company, the breach occurred in late September 2026 when the subcontractor’s legitimate account credentials were stolen and subsequently misused by the attackers. Using these credentials, the threat actors gained access to customer system environments directly from the subcontractor’s terminals.
In the compromised customer environments, files stored on servers were encrypted, leaving the systems in an unusable state. Additionally, files were exfiltrated from a cloud storage service employed for information sharing among NEC, the subcontractor, and affected customers. These files included customer-held personal data as well as system-related information.
NEC has already contacted all impacted customers individually and is coordinating response measures. Further details regarding the specific personal information involved will be reported to customers once they are confirmed.
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