Overview
Notice uses “about 26,800” and approximate subset figures so count blank. Health admin, nurse filings and hospital lists among categories.
Timeline
- Occurred
- Discovered
- Disclosed
Organization response
Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.
What you can do
Be wary of emails, SMS or calls impersonating the organisation; do not open links or attachments or enter passwords or card details. Change reused passwords on other services.
Sources
- 県委託事業者へのサイバー攻撃について（プレスリリース資料）山形県 · 2026-11-09
- 県委託事業者へのサイバー攻撃について山形県 · 2026-11-09