Yonsei University portal hack leaks data of 10,000 students, graduates

Yonsei University said Thursday that a hack of its portal exposed personal information belonging to about 10,000 students and graduates. The university confirmed unauthorized access by an external party and said the exposed data included student ID numbers, mobile phone numbers and email addresses, along with some system management information. It said resident registration numbers were not compromised, blocked the point of intrusion and requested a police investigation. Details for each affected individual were scheduled to be posted on the university website from 1 p.m. Thursday.

The university’s information and communications office confirmed the unauthorized portal access and apologized for the concern and inconvenience caused by the breach.

The exposed information covered current students and graduates.

The university said it would provide details of the specific personal information exposed for each affected individual on its website from 1 p.m. Thursday.

Published Oct 22, 2026 10:32 am KST

A sign at the gate of Yonsei University’s main campus in Seoul, Dec. 1, 2024 / Newsis

Personal information belonging to about 10,000 Yonsei University students and graduates has been leaked in a hacking of the university's portal service, the university said Thursday.

Yonsei University's information and communications office said it has confirmed unauthorized access to the portal by an external party, resulting in the exposure of personal information of some members of the university community. It apologized for the concern and inconvenience caused by the breach.

The exposed data includes student ID numbers, mobile phone numbers and email addresses of current students and graduates, as well as certain system management information, the university said.

However, sensitive personal information, such as resident registration numbers, was not compromised, it said.

After discovering the hack, the university took steps to block the point of intrusion and requested a police investigation.

The university said details of the breach, including the specific types of personal information exposed for each affected individual, will be available on its website from 1 p.m. Thursday.

延世大学周四表示，其门户网站遭到黑客攻击，导致约1万名学生和毕业生的个人信息泄露。该大学证实，外部人员未经授权访问了该网站，并表示泄露的数据包括学生证号码、手机号码、电子邮件地址以及一些系统管理信息。校方称，学生的居住登记号码未受影响，已封锁了入侵点，并请求警方介入调查。受影响人员的详细信息将于周四下午1点起陆续在大学网站上公布。

大学信息与通讯办公室证实了未经授权的门户网站访问事件，并对此次安全漏洞造成的担忧和不便表示歉意。

曝光的信息涉及在校学生和毕业生。

该大学表示，将于周四下午1点起在其网站上公布每位受影响者的具体个人信息泄露详情。

发布于2026年10月22日上午10:32（韩国标准时间）

2024年12月1日，首尔延世大学主校区大门上的标牌 / Newsis

延世大学周四表示，该校门户网站服务遭到黑客攻击，约1万名延世大学学生和毕业生的个人信息遭到泄露。

延世大学信息与传播办公室表示，已确认有外部人员未经授权访问了该校门户网站，导致部分校内成员的个人信息泄露。校方对此次安全漏洞造成的担忧和不便表示歉意。

该大学表示，泄露的数据包括在校学生和毕业生的学生证号码、手机号码和电子邮件地址，以及某些系统管理信息。

声明称，但居民登记号码等敏感个人信息并未泄露。

发现黑客攻击后，大学采取措施封锁入侵点，并要求警方进行调查。

该大学表示，有关此次数据泄露事件的详情，包括每位受影响者的具体个人信息泄露类型，将于周四下午 1 点起在其网站上公布。