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ColdRecon / Breach Radar / Nihon Keizai Shimbun
Breach Record

Nihon Keizai Shimbun

DISCLOSED 2026-10-06 · STOLEN CREDS · 1,646 RECORDS EXPOSED

Nihon Keizai Shimbun disclosed that attackers compromised employees' Microsoft 365 accounts and used them to send about 9,000 spoofed emails. Additionally, a cloud service was accessed without authorization since late July, potentially exposing personal information of 1,646 employees and business partners.

The record

What we know

Disclosed
2026-10-06
Attack vector
Stolen Creds
Sector
media
Country
Japan
Records exposed
1,646
Data classes exposed
personal information
ColdRecon assessment

Could a positive-security control have prevented this?

Verdict · unclear · opinion

The attack involved compromised cloud accounts and unauthorized access to a cloud service; a positive-security model focused on endpoints would not directly address cloud account compromise or email spoofing.

Our assessments are opinion, grounded in the cited public facts. Read them critically.

Sources

Cited reporting

↗ thecyberexpress.com
Similar vector · recent

Other stolen creds breaches on file

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