Overview
The January 8 second report explicitly refers to the January 7 announcement. The 423 items are one category, not the overall number including historical emails or a unique-person count, so the numeric field is NULL. Occurrence and discovery dates are not established in the reviewed text. Reports of leakage or related harm had not been received.
Timeline
- Occurred
- Discovered
- Disclosed
Initial announcement, explicitly dated in the second report.
Second report described the 423 items and possible email exposure.
Organization response
The university said it would continue gathering information and strengthen university-wide information management and recurrence prevention.
What you can do
Check notices through the organisation’s genuine contact channels. Do not enter credentials or payment details through links in unexpected messages.
Sources
- Possible leakage due to unauthorised access: second reportTokyo Metropolitan University Corporation · 2026-11-09
- 教員個人Googleアカウントの不正アクセス・第二報東京都立大学 · 2026-11-09