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Yonsei University's portal service was hacked, leaking personal information of about 10,000 current students and graduates, the university said Thursday. The breach occurred in two windows—Oct. 20 from 7:41 to 7:43 p.m. and Oct. 21 from 10:04 to 10:11 a.m.—and the university has requested a police investigation, according to Yonhap and other outlets. The leaked data includes names and other personal details of students and graduates, as reported by Maeil Business Newspaper and Chosun Ilbo. Korean media coverage focuses on the scale and timing of the breach, with Yonhap noting the university notified members via text message on the morning of Oct. 22.