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JAENES
SPossible leakOctober 5, 2026 announced

大阪公立大学Data breach / unauthorized access incident

笹尾 祐太朗の写真Reviewed by Yutaro SasaoWritten by Leak Watch editorial team published ・ updated
Occurred on
October 2, 2026
Announced on
October 5, 2026
Severity
SCompromise of deep personal data or usable credentials.
Scale
Unknown
Main impact
Determined to be a ransomware attack, which halted academic affairs, human resources, payroll and other systems. Whether personal data was leaked is currently under investigation.
Information involved
Not specified in the disclosure
Cause / key point
Cause is under investigation.About Ransomware
Industry
Education
Listing / capital
Government / public body

Public university

Sources
Last updated
October 20, 2026
How severity is assessed →

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Written & reviewed

笹尾 祐太朗の写真

Reviewed byYutaro SasaoFounder & CEO, MediaLeap Inc.

CEO of MediaLeap Inc. Working on both sides of web advertising and web media since 2013; founded the company in May 2025.

Review scope: cross-checking against primary sources (official and government announcements), verifying claims stay within the facts, and checking source attribution。Last reviewed:

Written by:Leak Watch editorial team (AI-assisted drafts verified against sources by the editorial team) · Reviewer profile · Request a correction

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Attack method classification: Ransomware(Encrypting data and demanding a ransom)

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