NEC Corp. said Friday it came under major cyberattacks that resulted in unauthorized access to 27,445 files, including those related to its work with the Defense Ministry, over several years through 2018.
The company said it had not confirmed any damage such as unauthorized disclosures resulting from the attacks. The files were saved on servers it used for defense-related and other business. Highly classified information, such as proposals to clients, were kept at a remote location that was not connected to the network, it said.
The revelations have added to concerns about the nation's cybersecurity. Last week, Mitsubishi Electric Corp. admitted it had been subject to a similar attack and that some classified information was leaked. Mitsubishi Electric also holds a key position in Japan's defense and infrastructure industries.