Bithumb Hack Probe Continues; No Crypto Losses Reported

Bithumb says an outsider breached an internal mobile communications system used by employees and stole personal information. The South Korean crypto exchange is investigating whether member data was exposed, how many people may be affected, and whether deposits or withdrawals were disrupted. Bithumb has notified South Korean authorities, including KISA and the Personal Information Protection Commission. The exchange says the compromised system is separate from its trading infrastructure. No customer crypto losses or direct impact on trading systems have been reported, and Bithumb has not disclosed a full timeline or the number of affected accounts. The incident comes amid a broader wave of cyberattacks on South Korea’s financial sector: the Financial Supervisory Service said 16 institutions had been targeted by 14 October. Daishin Securities reported that personal and credit data for 38,490 customers was exposed, while Mirae Asset Global Investments said suspicious access was blocked without investor data being affected. For traders, the key updates are whether Bithumb confirms a member-data breach and how it handles remediation. The investigation could prompt regulatory scrutiny and add pressure to the exchange’s governance as it plans a 2028 listing. The breach also renews attention to Bithumb’s controls following its February error, when it mistakenly credited customers with 620,000 BTC instead of 620,000 won. So far, no direct effect on Bithumb’s trading or customer assets has been reported.