Coinone Warns Customers of Data Breach via Third-Party Support

Cryptocurrency exchange Coinone issued a statement regarding a security incident that exposed sensitive user information. The attack took place on the servers of MetaM, a company that provides customer support services for the platform.

Compromised data includes names, phone numbers, email addresses, and dates of birth. National identification numbers, bank accounts, passwords, home addresses, and crypto wallet addresses were also exposed.

The company states that the leak affected only customers who contacted support. Users who never utilized this service did not have their information exposed in the incident.

Coinone's trading infrastructure and internal wallets were not directly accessed by the attackers. The exchange emphasizes that its internal custody systems remain separate from MetaM servers.

The case has been reported to South Korean authorities for investigation. The brokerage advises all customers who shared passwords during previous support interactions to change their access credentials immediately.