Fujitsu says the attackers behind the May data breach used a vulnerability in the company’s ProjectWEB information-sharing tool to steal accounts from legitimate users and access proprietary data belonging to multiple Japanese government agencies. The National Cyber Security Center (NISC) of Japan and the country’s Ministry of Land, Infrastructure, Transport, and Tourism revealed at the time that the threat actors gained access to at least 76,000 email accounts during the ProjectWEB breach.

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