Yonsei University's portal service was hacked via an external attack, resulting in the leakage of personal information for over 15,000 current students, alumni, and faculty members.

The university stated, "Student ID numbers, mobile phone numbers, and email addresses were leaked," while adding that "sensitive information such as resident registration numbers was not compromised."

Having notified the Personal Information Protection Commission and the Ministry of Education of the leak, Yonsei University plans to post the corrective measures on its website starting this afternoon, October 22.