BOOKOFF Corporation security incident history
Hacking, data breaches and other security incidents involving BOOKOFF Corporation, with related coverage.
Incidents: 1 · Most recent
BOOKOFF October hack exposes information on 6,383,279 members
6.4MImpact: Information on 6,383,279 members
Member information was leaked from BOOKOFF Corporation’s membership management system between October 4 and 6, 2026, and the company confirmed unauthorized access on October 6. The breach affected 6,383,279 members, exposing information including names, dates of birth, addresses, email addresses, phone numbers, and password hashes. The company blocked the attack route, individually notified affected members, and asked them to change their passwords.
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