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Bithumb, a major South Korean crypto exchange, confirmed that personal information was leaked after an unauthorized external party accessed its internal mobile groupware system, with the breach estimated to have occurred the previous day. The exchange reported the incident to the Korea Internet & Security Agency (KISA) and the Personal Information Protection Commission, and is analyzing the exact scope of the leak, including whether member information was affected, according to Chosun Ilbo and Dong-A Ilbo. The incident is part of a broader wave of cyberattacks hitting Korea's financial sector, with Daishin Securities reporting that personal and credit information of 38,490 customers was leaked, and Mirae Asset Global Investments also affected, prompting financial authorities to launch inspections, Yonhap and Korea Times report. Korean media coverage focuses on the rapid disclosure and regulatory response, with financial authorities dispatching on-site inspection teams to Daishin Securities to assess damage across institutions.