TIME SINCE MOST RECENT KOREAN CYBERSECURITY FAILURE
Yonsei University
More than 10,000 students, alumni, and other university community members had personal information exposed through unauthorized access to the Yonsei Portal Service. The university blocked the access route and requested a law-enforcement investigation.
Saemaul Geumgo
A hacking attack on October 10 exposed personal and credit information belonging to approximately 400 customers. The institution reported the incident to financial authorities on October 13 and is notifying affected customers, promising compensation for damage caused by the leak.
Sarang Community Church
Sarang Community Church in Seoul was suspected of suffering a breach affecting approximately 89,000 members and 286 employees. Stolen personnel and membership data were found on an external server, with logs indicating the data was taken in August.
Yoido Full Gospel Church
Yoido Full Gospel Church reported that personal information of up to 850,000 members may have been exposed after the Korea Internet and Security Agency notified it of a suspected breach. Discovered data included names, dates of birth, and histories of changes to resident registration numbers, phone numbers, and addresses.
Korea Electric Power Corporation (KEPCO)
KEPCO reported that names, affiliations, and phone numbers of approximately 24,000 employees were exposed on an external webpage. The utility issued a related press release on October 4, 2026.
Korea Electric Power Corp. (KEPCO)
KEPCO said the personal information of about 24,000 employees was exposed on an external website. The company said customer information stored in a separate system was not compromised.