Hack at Coinone customer support contractor exposes personal information
SpilloverSpillover from the MetaM incident · View original incident →On November 12, 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 phone consultations, with the specific data varying according to each person’s consultation.
Key facts
- Affected organization
- Coinone
- Original incident
- MetaM customer service systems hacked, exposing phone numbers and conversations
- Incident type
- Data breach
- Occurred / detected
- 2026-11-12
- Scale of damage
- Not confirmed
- Cause / method
- Breach of servers belonging to customer support contractor MetaM
- Location
- South Korea
If your data was exposed
Exposed dataNamePhone numberBank account
- Don’t tap links in texts, calls or emails that mention this incident and offer compensation, refunds or breach checks. Check directly on the organization’s official website or app.
- Turn on deposit and withdrawal alerts in your banking app. You can check all accounts in your name at once and request a payment suspension if needed.Account Info (integrated account management) ↗
- If you’ve suffered harm, report it. Call 118 (no area code) for privacy violations, contact the police for financial losses, and apply for dispute mediation to seek compensation.Personal Information Infringement Report Center ↗Korean National Police Agency cybercrime report ↗Personal Information Dispute Mediation Committee ↗
Lookup and notice links are official pages found by AI. Make sure the address is on the organization’s official domain before using it.
Timeline
- It was disclosed that Coinone customers’ support information had been viewed or exfiltrated following a hack at its customer support contractor.
Original incident
This is spillover from the MetaM incident.
MetaM customer service systems hacked, exposing phone numbers and conversations
Impact: Phone numbers and customer service conversations in some customer service systems
An external attack on some of MetaM’s customer service systems revealed indications that phone numbers and customer service conversations had been accessed without authorization or exfiltrated. MetaM became aware of the incident following a customer service outage at 6:03 a.m. on November 12, 2026. During its investigation, the company found that abnormal access to some services had occurred before it became aware of the incident, and it is investigating the extent of any further data exposure and the intrusion vector.
Related reports: 2 · last report →
2 related reports
The summary and key facts are written by AI from related reports and may contain errors. Check the original articles and the organization’s official statements for accurate details.