東京都立大学（教員のGoogleアカウント）Data breach / unauthorized access incident
- Occurred on
- December 2, 2025
- Announced on
- January 8, 2026
- Severity
- SCompromise of deep personal data or usable credentials.
- Scale
- 423 records
- Main impact
- Published a second report on unauthorized access to a Googleアカウント acquired privately by a faculty member. The disclosed impact is events etc. 180 + entrance exams etc. 249 − duplicates 6 = actual 423 cases.
- Information involved
- Email addressUser / member IDAuth tokenPhone numberHome addressFull name
- Cause / key point
- It states that the faculty member was lured by a phishing email sent from an overseas researcher's account and entered their Googleアカウント information.About Targeted email & phishing
- Industry
- Education
- Listing / capital
- Government / public body
- Last updated
- October 20, 2026
Is this incident worth paying attention to?
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CEO of MediaLeap Inc. Working on both sides of web advertising and web media since 2013; founded the company in May 2025.
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Attack method classification: Targeted email & phishing(Fake emails and sites that steal credentials)
Read the Targeted email & phishing guide and national trends →