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South Korea's state-run Financial Security Institute (FSI) reported a data leak after a hacking attack on its security assessment system, officials said Tuesday. The breach, which occurred on Nov. 9, affected the institute's 'information security regular evaluation' site, leaking about 850 pieces of information, including personal data of employees from 48 financial firms, administrative forms, and samples of personal credit information consent forms. The FSI has apologized, saying, "As a financial security expert agency, we should have maintained high-level security and trust, but we sincerely apologize for causing concern to financial firms and the public." Financial authorities launched an on-site inspection on Nov. 11. The attack has raised concerns about secondary damage and the broader security of the financial system, especially as the IMF recently flagged cyberattacks as one of three financial stability risks for South Korea.