Bithumb Confirms Security Breach as FSS Probes Financial Sector Intrusions

Key Insights Bithumb confirmed an employee data breach; the extent of customer exposure remains unclear. FSS is investigating breaches in the financial sector and inspecting Daishin Securities. Bithumb says its trading systems are separate; no crypto theft has been confirmed. Bithumb confirmed a security breach involving employee personal information as South Korean regulators examined intrusions across several financial firms. The exchange detected unauthorized access to its internal mobile work system on October 27, 2026. The exchange disclosed the incident on October 28 while investigating whether attackers also accessed information belonging to customers. The Financial Supervisory Service (FSS) is assessing breaches involving the exchange, Mirae Asset Global Investments, and Daishin Securities. It has also dispatched an inspection team to Daishin Securities to examine the security incident.

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