On October 29, Bithumb reported that on October 27, its internal mobile collaboration system DaouOffice was accessed by an unauthorized external party, resulting in the theft of some personal information of customers and employees. The incident involves 6,444 customers, of which the data of 5,600 individuals is encrypted and unreadable, while 844 customers have confirmed personal information leakage. Additionally, the information of 715 employees and partner personnel was affected. The potentially leaked information includes names, mobile phone numbers, email addresses, resident registration numbers, driver's license numbers, bank account numbers, and copies of identification documents. Bithumb emphasized that the compromised system is independent of the trading platform and customer database, and no direct intrusion into the exchange service system has been detected, nor has there been any access to customers' virtual assets as a result. The company has reported the incident to the Korea Internet & Security Agency and the Personal Information Protection Commission, and will provide support and compensation to affected customers.