Nikkei says cloud breach leaked about 1.83 million records
Original title: Nikkei data breach affected over 1.8 million records
Attackers used stolen credentials on October 7; about 150,000 records held identifying data and no card data was included.
Japanese media company Nikkei disclosed unauthorized access to a cloud service used for system development, with about 1.83 million personal-information items leaked as of October 16. Attackers used previously stolen credentials on the morning of October 7. About 150,000 items included a name, email, postal address, phone number, or date of birth, and about 120,000 of those included an email address; about 1.68 million items could not identify a person. Nikkei said no credit card data was included, reported the breach to Japan's Personal Information Protection Commission on October 11, and blocked the stolen credentials.
Unconfirmed: Nikkei says it is still investigating the full scope of what personal information was stolen.
- About 1.68 million leaked items could not identify an individual.
- Nikkei found no misuse, outages, or data changes as of October 16.
- The company said it will notify people whose personal information was exposed.
- Nikkei previously disclosed a May 2022 ransomware attack and a November 2025 Slack-related breach.
Impact: About 1.83 million personal-information items leaked from a development cloud
- 1.Watch for notices from Nikkei if personal information was exposed.
- ATT&CK
- T1078 Valid Accounts
- Victims
- Nikkei
- Organizations
- Personal Information Protection Commission
- Countries
- Japan
From the original article
1 min read at securityaffairs.com
Nikkei disclosed a data breach affecting over 1. 8 million records after hackers used stolen credentials to access a cloud service for system development. Japanese media company Nikkei has disclosed a data breach affecting more than 1.
By Pierluigi Paganini · securityaffairs.com
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