DECRYPT · 2026-10-28 10:57 UTC

Bithumb Says Hackers Accessed Internal System, Leaking Personal Data

Bithumb, South Korea's second-largest crypto exchange, reported that hackers accessed its internal mobile groupware system, leaking customer personal information. The breach is one of four data leaks reported on the same day affecting Coinbase (via vendor Amplitude), Bithumb, and two South Korean securities firms, with Binance's CZ warning that leaked exchange data is used for phishing and SIM swapping attacks. Bithumb has faced multiple setbacks in 2026 including a February error crediting users with 620,000 BTC, a March fine and suspension order for AML failures, and regulatory scrutiny of…

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