Bithumb detected on Tuesday, October 27, an intrusion into its internal employee messaging system, which was separate from its trading system, and alerted the South Korean authorities. The extent of the breach was still unknown on Wednesday morning: it may involve member data, while customers’ cryptocurrencies were reported to be out of reach. Daishin Securities confirmed the leak of personal and credit information affecting 38,490 clients, while Mirae Asset blocked abnormal external access without reporting any compromised investor data. South Korea’s financial regulator had already counted 16 companies affected by cyberattacks since January, and Seoul is preparing to postpone the cryptocurrency tax until 2029. These incidents increase the risk of targeted phishing campaigns and could expose Bithumb to fines of up to 3% of its total revenue.
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