Nikkei Inc. announced on October 16 that a cloud service it uses for system development was accessed without authorization, leaking about 1.83 million personal data records as of that day [1]. The company says credentials for the cloud service were stolen and the access took place in the early hours of the 7th; about 150,000 records include a name, email, address, phone or birth date and about 1.68 million are identifiers that alone cannot identify a person, with no card data; Nikkei also disclosed two unauthorized account logins on October 4 [1][2]. Affected people should watch for individual notices from Nikkei, which has disabled the abused credentials [1].
Nikkei development cloud credentials stolen, leaking about 1.83 million personal data records
1 min read
- Disclosed
- Oct 16, 2026
- Occurred
- Oct 7, 2026
- Published
- Nov 11, 2026
- Last updated
- Nov 11, 2026
- Scale
- 1,830,000 records[1]
- CVSS basis
- Our assessment
- Technology
- Attack vector
- Impact
- Data type
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Media, entertainment & gaming
What to do nowOur advice
- Watch for individual notices from Nikkei [1].
- Organizations using cloud development environments should rotate and restrict access credentials .
Timeline
Technical details
Remediation
Vendor guidance
- 1Watch for notices detect[1]
Watch for individual notices from Nikkei.
References
Official / primary1
- [1]
“日本経済新聞社がシステム開発に利用するクラウドサービスが不正アクセスを受け、16日時点で約183万件の個人情報が漏洩しました。”
Media1
- [2]
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