omu-ransomware-2026 · Disclosed 2026-10-02
Osaka Metropolitan University: infrastructure outage attributed to ransomware
The university attributed its October 2 outage to ransomware. Virtual servers stopped and signs of data alteration were found; personal-data leakage remains under investigation.
Outcome: Confirmed breach
Entry path and evidence
- Reported fact
The university stated that it judged the incident to be a ransomware attack.
[s1]本文 会見説明 - Reported fact
Network, email, teaching, finance, payroll and library systems stopped; personal-data leakage is still being investigated.
[s1]本文 影響範囲 / 個人情報 - Reported fact
Servers began stopping around 00:20 on October 2; investigation after 04:00 found signs of data alteration.
[s2]資料2 10月2日の経緯
Timeline
Reported response
- Reported fact
A crisis headquarters and external specialists handled investigation and recovery. Temporary systems supported the announced October 9 return to in-person classes.
Cause and mitigation hypotheses
Not assessed. Editorial hypotheses have not been added for this incident; this does not establish safety or a confirmed cause.
Evidence relevant to prevention
Insufficient evidence
The entry mechanism is undisclosed; avoidability cannot be assessed. Inspect exposure, privileges, logs and retained data using the linked rules.
Editorial assessment; not a determination of liability. [s1]
Unknowns and AI involvement
The reviewed disclosures do not establish attacker use of AI.
The intrusion start, entry route and whether or how much personal data leaked are not established.
Sources
[s1] 大阪公立大学 · Primary source
情報基盤システムにおける障害に関する記者会見を実施 ↗Published 2026-10-06 · Reviewed 2026-10-19
[s2] 大阪公立大学 · Primary source
10月5日記者会見配付資料 ↗Published 2026-10-05 · Reviewed 2026-10-19
[s3] 大阪公立大学 · Primary source
本学情報基盤システムにおける障害の発生について【第4報】 ↗Published 2026-10-08 · Reviewed 2026-10-19