Bithumb confirms breach of internal system and data leak

South Korean crypto exchange Bithumb has confirmed that an outside party gained access to its internal mobile groupware system, leaking personal data. The exchange found the incident on Tuesday, Oct. 27, and is investigating whether customer information was affected, according to The Korea Times, citing company statements.

Details

Seoul Economic Daily reported that Bithumb said its internal mobile system was hacked and personal information leaked. The reports do not say how many people are affected, what data was exposed or whether any funds were taken, and Bithumb has not reported any stolen crypto. Details are still thin; these are early reports.

Asset manager Mirae Asset Global Investments and brokerage Daishin Securities also reported cyberattacks the same day. Daishin disclosed that personal and credit data of 38,490 customers leaked after unauthorized access to a server handling online account openings, detected on Oct. 17. Mirae Asset spotted unusual system activity on Sunday. Wu Blockchain, relaying Yonhap, said Korea's Financial Supervisory Service (FSS) is investigating.

What it means for the market

The incident extends a wave of attacks on South Korea's financial sector that began with a breach at Shinhan Bank on Sept. 30. Regulators earlier counted 16 affected firms, including exchanges Gopax and Pravang; we covered the chain of breaches in our explainer. So far this is a data leak, not a theft of funds, so no direct impact on BTC is expected. For customers, the main risk is phishing and fraud built on leaked contact details. For the live price, see the daily brief.

This is not investment advice.