INSPECTING ARCHIVED INTELLIGENCE (OUTDATED VERSION).

Nikkei Records Compromised

| 2026-10-20 10:35 HIGH LOW DATA BREACH
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Executive Summary
AI-generated
On October 7, hackers used previously compromised credentials to access a cloud service of Japanese media giant Nikkei, resulting in the theft of more than 1.8 million records. The incident involved information that could be used to identify individuals, including names, addresses, email addresses, phone numbers, and dates of birth, as well as 150,000 records containing this sensitive data. No credit card information was compromised. Nikkei revoked the compromised credentials immediately after identifying the breach and will take additional security measures if necessary. As of October 16, there is no evidence that the stolen personal information has been misused. The incident occurred less than a year after another data breach stemming from a Slack account hack by California Students' Records.
Technical Mitigations AI-generated
• Reset credentials and API keys that may have been exposed, and review access logs for the affected accounts or integrations.
Intelligence Metadata
Actors / Malware / CVEs / Campaigns
Target & Sectors
FIVE_EYES FIVE_EYES
Incident Timeline
‎October 7
Hackers used previously compromised credentials to access the cloud service on October 7.
‎October 16
Threat actors used social engineering tactics to steal 1.8 million records from Nikkei on or before October 16.
‎2026/10/20
Hackers stole 1.8 million records from Nikkei, a Japanese media giant known for major financial publications including The Nikkei and Financial Times.
organisation California Students’ Records
Related: One Compromised Login Exposed Millions of California Students’ Records Related: UK Legal Aid Agency Hack Scope Widens
data_breach 1.8 records
Japanese media giant Nikkei has disclosed a fresh data breach impacting more than 1.8 million records.
Hackers Steal 1.8 Million Records From Nikkei.
organisation Slack
The announcement comes less than a year after the company disclosed a data breach stemming from a Slack account hack.
organisation Forensic Review
After Forensic Review Related: CenterPoint Energy Data Breach Impacts 1 Million Texans Related: Meta Says Hackers Took Code, Personal Data of 1,500 in GitHub Breach
organisation CenterPoint Energy Data Breach
After Forensic Review Related: CenterPoint Energy Data Breach Impacts 1 Million Texans Related: Meta Says Hackers Took Code, Personal Data of 1,500 in GitHub Breach
organisation Personal Data
After Forensic Review Related: CenterPoint Energy Data Breach Impacts 1 Million Texans Related: Meta Says Hackers Took Code, Personal Data of 1,500 in GitHub Breach
organisation GitHub Breach
After Forensic Review Related: CenterPoint Energy Data Breach Impacts 1 Million Texans Related: Meta Says Hackers Took Code, Personal Data of 1,500 in GitHub Breach
organisation Hackers Steal 1.8 Million Records From Nikkei
Hackers Steal 1.8 Million Records From Nikkei.
organisation The Nikkei and Financial Times
According to the company, best known for major financial publications, including The Nikkei and Financial Times, the incident involved a cloud service it uses for system development.
data_breach 1.83 records
While a total of 1.83 million records were stolen, about 1.68 million included only information that cannot be used to identify an individual, the company says.
data_breach 1.68 records
While a total of 1.83 million records were stolen, about 1.68 million included only information that cannot be used to identify an individual, the company says.
data_breach 150,000 records
Of the remaining records, 150,000 contained names, addresses, email addresses, phone numbers, and dates of birth, and 120,000 contained email addresses.
Tactical Metrics
Metrics
data_breach
1,800,000
Records
Japanese media giant Nikkei has disclosed a fresh data breach impacting more than 1.8 million records.
Hackers Steal 1.8 Million Records From Nikkei.
Metrics
data_breach
1,830,000
Records
While a total of 1.83 million records were stolen, about 1.68 million included only information that cannot be used to identify an individual, the company says.
Metrics
data_breach
1,680,000
Records
While a total of 1.83 million records were stolen, about 1.68 million included only information that cannot be used to identify an individual, the company says.
Metrics
data_breach
150,000
Records
Of the remaining records, 150,000 contained names, addresses, email addresses, phone numbers, and dates of birth, and 120,000 contained email addresses.
Intelligence Sources
SecurityWeek 2026-10-20