Customer information was exposed in the breach of Bithumb’s internal office system, South Korean news agency NewsPim reported on October 29.
Customer data identified during review
The outlet said the exchange identified customer data while investigating unauthorized access to Daou Office on October 27. It described Daou Office as an employee collaboration tool operated separately from the cryptocurrency service used by customers.
NewsPim said the precise number of people affected and the types of information involved were still being determined when it reported at 17:01 Korea Standard Time, or 08:01 UTC.
Sources: NewsPim’s October 29 report; BlockBeats follow-up, published October 29, 2026, at 08:54:58 UTC.