Casio

Disclosed Oct 7, 20248,500 affectedUnverified

Ransomware attack on Casio steals employee, partner and some customer data

Casio confirmed an October 2024 cyberattack was ransomware claimed by the Underground gang, which took personal data of employees, contractors, partners and job applicants plus invoices and HR files; in January 2025 it put the total at about 8,500 people.

What is known

People affected	8,500 (as reported by the organization)
Disclosed	Oct 7, 2024
Attack	Ransomware
Data exposed	EmploymentNamesInternal documents
Sector	Manufacturing · JP
Status	Unverified: not yet confirmed by an official notice, a filing or the organization

Sources

Newstechcrunch.com

Casio confirms customer data compromised in ransomware attack

Newstechcrunch.com

Casio says hackers stole personal data of 8,500 people during October ransomware attack

Notices filed

TotalOct 7, 2024

Research8,500 people

History of this record

Added2026-09-25

First recordedby seedSource

First seen 2026-09-25 (Research). Record counts are as reported. Not legal advice.

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