Bithumb's internal systems were compromised, resulting in the leakage of information on 6,444 users and 715 employees.

On October 27, Bithumb's internal mobile office system was compromised, resulting in the leakage of information on 6,444 users and 715 employees. Of these, 5,600 user records were encrypted, while the records of 844 users were accessible. Bithumb has blocked access and filed an incident report with the Korea Internet & Security Agency and the Personal Data Protection Commission.