# Coinone discloses customer data leak at support vendor MetaM

_Published Sunday, November 15, 2026 at 12:18 AM EST · Security · Latest · Tier 2 — Notable_

![Coinone Reports Data Breach from Customer Service Vendor Server | KuCoin — Primary](https://assets.staticimg.com/@kudos/runtime/1.0.0/assets/og-ea52b6f9440e857c.jpg)

South Korean cryptocurrency exchange Coinone disclosed on November 15 that a breach at customer service vendor MetaM exposed information customers supplied during chat or phone inquiries, ME News reported. The intrusion occurred early on November 12. Potentially exposed information includes passwords, Korean resident registration numbers, account numbers and wallet addresses; the items vary by customer.

Coinone switched external customer service to email and urged customers who shared passwords during consultations to change them, including on other sites using the same credentials. It has not yet disclosed the number affected. Customers without support inquiry records are unaffected, and Coinone said it detected no direct compromise of its separate account, trading or wallet systems.

## Sources

- [kucoin](https://www.kucoin.com/news/flash/coinone-reports-data-leak-from-customer-service-vendor-server)

---
Canonical: https://techandbusiness.org/newswire/Uf91CCAfGTOsTvhwknSskH
Published: 2026-11-15T05:18:06.481Z
Story chronology: 2026-11-15T04:43:13.000Z
Retrieved: 2026-11-15T05:54:21.359Z
Publisher: Tech & Business (techandbusiness.org)