Nikkei discloses breaches of employees’ Microsoft, Google email accounts

Japanese media conglomerate Nikkei disclosed two separate breaches involving employee email accounts. In late July 2026, an attacker accessed a Google Workspace account, exposing personal information of 1,646 employees and business partners. In September 2026, another employee's Microsoft 365 account was compromised and used to send approximately 9,000 phishing emails to internal staff and interviewees. The malicious emails contained links to malicious websites, prompting Nikkei to reset passwords and notify affected recipients. The company has not attributed the attacks to any specific threat actor or confirmed if the incidents are related.

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