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Data Breach Affects 16,000 in Seoul Schools, Linked to PowerSchool Cyberattack

Data Breach Affects 16,000 in Seoul Schools, Linked to PowerSchool Cyberattack

First seen 2 Nov 2026, 09:14 UTC • •

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ThreatCluster AI
ThreatCluster •November 2, 2026 at 10:15 UTC
  • •16,000 personal records compromised in a December 2024 cyberattack on PowerSchool.
  • •Affected schools continue using PowerSchool, raising concerns over data protection measures.
  • •Seoul education officials have limited their response to advisory notices and self-assessments.

A cyberattack on PowerSchool in December 2024 compromised personal information of approximately 16,000 individuals associated with three international schools in Seoul. The breach included names, birth dates, email addresses, and health-related information. Despite the incident, the schools continue to use PowerSchool's system, raising concerns about data protection measures. The Seoul Metropolitan Office of Education reported that the breach affected 6,666 records at Seoul Foreign School, 1,000 at Yongsan International School, and 8,000 at Korea International School. PowerSchool reportedly paid the hackers to delete the stolen data, but concerns about further misuse remain. The education office's response has been limited to advisory notices, relying on self-assessments rather than independent audits. The breach has prompted calls for better oversight and security practices in handling personal data in schools.

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Timeline

2024-12-01
Cyberattack on PowerSchool
Hackers stole personal information of millions, impacting various educational institutions.
M.Koreaherald
2025-01-01
Data breach reported
Seoul schools reported the compromise of 15,666 personal records due to the PowerSchool breach.
M.Koreaherald
2025-05-01
Extortion emails sent
Public schools in North Carolina and Canadian education authorities received extortion emails related to the stolen data.
M.Koreaherald
2026-01-01
Education office requests self-assessments
The Seoul Metropolitan Office of Education asked the affected schools to submit personal information protection self-assessment forms.
M.Koreaherald

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Common questions

What information was compromised?
The breach involved names, dates of birth, email addresses, phone numbers, and health-related information.
Are the affected schools still using PowerSchool?
Yes, all three international schools continue to use PowerSchool despite the breach.
What actions have been taken by the Seoul education office?
The education office has issued advisory notices and requested self-assessments from the schools.