Nikkei Suffers Data Breach Exposing 17,000 Individuals' Information
Nikkei, the largest business news outlet in the world, disclosed a data breach that exposed personal customer and employee information.
Key points
- Over 17,000 individuals had their information compromised.
- Exposed data included names, email addresses, and customer chat history.
- Caused by info-stealer malware on an employee's personal computer.
Connected intelligence
Signal brief
Follow the organization, likely method and potential impact to explore connected Shadow Tier intelligence.
Organization
- Published
- Nov 14, 2025
- Updated
- Jun 25, 2026
- Confidence
- Medium
- Evidence
- 2 sources
Structured assessment
Signal analysis
It helps compare this signal with other published signals without treating the labels as final determinations.
Threat source
Watch ransomware, endpoint compromise and business interruption exposure.
- Source type: possible insider or internal misuse
Business impact
- Impact area
- Confidentiality
- Likely asset
- User or customer data
Mentioned entities
Quick context
Questions about this signal
What happened in this signal?
Nikkei, the largest business news outlet in the world, disclosed a data breach that exposed personal customer and employee information. The incident was caused by info-stealer malware infecting an employee's personal computer, leading to the theft of Slack credentials and access to company Slack accounts.
When was this signal reported?
Shadow Tier lists Nov 14, 2025 as the signal date.
Which organization is connected to this signal?
Nikkei is the organization connected to this public signal.
Explore NikkeiRelated signals
Compare shared topics, actors and incident patterns before opening the full signal.
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