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Osaka Metropolitan University Faces Ransomware Attack and Data Leak

Osaka Metropolitan University Faces Ransomware Attack and Data Leak

First seen 6 Oct 2026, 17:04 UTC • •

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ThreatCluster AI
ThreatCluster •October 6, 2026 at 18:04 UTC
  • •Osaka Metropolitan University canceled classes due to a suspected ransomware attack.
  • •Data of at least 130,000 individuals may have been exposed, including personal information.
  • •The university is investigating the incident with external cybersecurity experts.

Osaka Metropolitan University canceled classes and shut down its IT infrastructure following a suspected ransomware attack that began on October 2, 2026. The attack has rendered internal networks, email, and various administrative systems unavailable. The university reported that data belonging to at least 130,000 students and faculty may have been exposed, including names, addresses, and email addresses. Although the university has not confirmed if personal data was stolen, it is investigating the incident with cybersecurity specialists. The disruption has led to class cancellations through at least October 8, 2026, while some systems remain operational. The university has reported the incident to Japan's data protection authority and other government agencies. This incident follows a series of cyber breaches in Japan, although no connections have been established between them.

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Timeline

2026-10-02
Ransomware attack initiated
A suspected ransomware attack began, affecting 500 servers and rendering key systems unusable.
Therecord.Media
2026-10-06
Classes canceled
Osaka Metropolitan University announced class cancellations through at least October 8 due to the ongoing investigation and system outages.
Nippon

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Common questions

What data may have been leaked?
Data potentially exposed includes names, addresses, and email addresses of at least 130,000 students and faculty.
What is the current status of classes?
Classes have been canceled through at least October 8, 2026, with plans to resume depending on system recovery.
Is there confirmation of data theft?
The university has not confirmed whether personal data was stolen and is still investigating the incident.