Bithumb reportedly detected unauthorized access to an internal workplace tool by an outside party on October 27 and 28, resulting in the exposure of some customer data, although the full scope remains undetermined. Daishin Securities said the names, email addresses, and phone numbers of more than 38,000 customers were leaked, while Mirae Asset Global Investment was also affected. South Korea’s Financial Supervisory Service is investigating all three incidents and has urged banking groups to strengthen cybersecurity as artificial intelligence becomes more widely used in attacks. Changpeng Zhao recommended limiting shared information and using unique email aliases, hardware keys, or passkeys instead of SMS codes, while Foundation reported that more than 23,000 phishing emails were sent from its official domain.
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