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SM Entertainment and some affiliates, including Dear U and Dream Maker, confirmed on Nov. 8 that an external attacker accessed their work systems (such as the electronic approval system) without authorization and leaked some stored document files, exposing employees' resident registration numbers, bank account numbers, and contract details. The company apologized on its website, saying it is working with authorities to determine the exact scope of the incident, according to Yonhap and other outlets. The breach follows a separate leak at Mirae Asset Securities, which said on Nov. 7 that data of some 39,000 customers and employees was compromised, as reported by Korea Times and KBS World.