South Korean crypto exchange Bithumb reported on October 28, 2026, that an outside party had accessed its internal mobile groupware system and leaked personal information. Bithumb was still investigating whether customer data was exposed, although an industry source told Yonhap that some customer information had leaked. Bithumb has not said how the system was accessed.
Brokerage Daishin Securities also reported a breach, saying the personal information of 38,490 customers was leaked after it detected signs of unauthorized access. Asset manager Mirae Asset Global Investments confirmed a hacking incident, and financial authorities began inspecting the incidents.
