Bithumb issues update on its hacker incident: A total of 6,444 users’ information was stolen, and most of the stolen user data is unreadable.

South Korean crypto exchange Bithumb has issued an announcement updating the aftermath of its recent incident. On October 27, unauthorized external personnel breached the company’s internal mobile office system (Daou Office), leading to the leakage of some personal information. The system is fully separated from exchange accounts and asset data, and no direct breach of the trading system or customer database has been detected so far. Bithumb has since strengthened real-time monitoring of abnormal transactions and withdrawals. The exchange disclosed that the total number of affected individuals includes 6,444 people: 5,600 of whose leaked data is encrypted and unreadable, while 844 have readable information exposed. Additionally, 715 employees and partner personnel had their information compromised. Stolen data includes names, phone numbers, emails, resident registration numbers, driver’s license numbers, bank accounts, and ID card copies. Bithumb emphasized that it immediately blocked access to the relevant system, deactivated it, and filed incident reports with the Korea Internet & Security Agency and the Personal Information Protection Commission. The company detected the unauthorized access to its internal mobile office collaboration system on October 27, and is currently analyzing the full scope of the leak, including whether member information is involved.