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Nikkei Data Breach Exposes Personal Information of Over 17,000 Individuals

Nikkei Data Breach Exposes Personal Information of Over 17,000 Individuals

First seen 23 Nov 2025, 03:35 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

Nikkei Inc., a major Japanese media conglomerate, reported a data breach affecting over 17,000 employees and business partners. The breach was caused by malware that compromised an employee's device, allowing attackers to access Slack credentials and chat histories. The company has informed Japan's Personal Information Protection Commission about the incident.

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