NIKKEI , the Japanese media group behind publications such as The Nikkei and Financial Times, disclosed a fresh data breach affecting about 1.83 million records. The incident involved a cloud service used for system development. Hackers gained access on the morning of 7 October by using previously compromised credentials, according to Nikkei.
The company says roughly 1.68 million of the stolen records contained information that cannot identify individuals, while about 150,000 records included names, addresses, email addresses, phone numbers, and dates of birth, and around 120,000 contained email addresses alone. No credit card data was compromised.
Nikkei states it revoked the compromised credentials immediately and is implementing additional security measures if needed. Regulators have been notified and the company continues to investigate the scope and nature of the data exposed. As of 16 October, Nikkei reported no evidence that the stolen personal information has been misused, and the incident did not cause disruptions or data tampering. The disclosure follows a data breach publicly linked to a Slack account hack reported by SecurityWeek less than a year earlier.