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Yonsei University confirmed that its portal service was hacked, leaking personal information of about 15,000 students, graduates, and staff. The university said an unauthorized outsider accessed the portal twice—on Oct. 20 at 7:41–7:43 p.m. and Oct. 21 at 10:04–10:11 a.m.—and viewed personal data. Leaked details include student IDs, names, mobile phone numbers, emails, department names, and last login times and IP addresses, according to Dong-A Ilbo and Yonhap. The breach comes two months after Sogang University suffered a leak of 180,000 records, with Maeil Business Newspaper noting renewed hacking targeting universities. Korean media outlets are reporting the incident as a serious security lapse, with Chosun Ilbo and Korea Times highlighting the scale of the exposure.