According to WuBlockchain, Bithumb disclosed on October 27 that a one-hour unauthorized access to its internal groupware compromised personal data of 6,444 customers and 715 employees. The breach exposed names, mobile numbers, resident registration numbers, bank account details, and identification document copies for 844 customers; 5,600 records remained encrypted. The affected system was isolated from Bithumb's main trading operations, ensuring customer funds remained secure.
Bithumb has committed to compensating verified damages. The exchange emphasized that this incident did not impact trading systems or customer asset security.