Coinone security incident history
Hacking, data breaches and other security incidents involving Coinone, with related coverage.
Incidents: 1 · Most recent
Hack at Coinone customer support contractor exposes personal information
↳ Knock-on damage from the MetaM incident · View original incidentOn 12 November 2026, an external attacker illegally accessed servers belonging to MetaM, Coinone’s customer support contractor, and viewed or exfiltrated customer support information. The exposed data included names, phone numbers, email addresses, bank account numbers, passwords, resident registration numbers and identity document issue dates that customers themselves provided during chat or telephone consultations, with the specific data varying according to each person’s consultation.
Related reports: 2 →