株式会社Gakken
- Aliases / services
- 株式会社Gakken / ガッケン / Gakken
- Official website
- https://www.corp-gakken.co.jp/
Sources identifying the operating company
Gakken Inc.; the response scope is not all systems throughout the Gakken group.
Each response applies only to its stated service scope. “Not listed” does not mean unpatched or unaffected.
Response status by service
Gakken-operated websites (individual sites not listed)
- Response status
- Emergency maintenance in progress
- Response information checked
- 2026-10-28
Current re-audit: Official response verified · Research date: 2026-10-28
Publishing and education company's websites
The October 23 notice announces sequential emergency maintenance for checks and countermeasures, with reopening after completion.
Scope: The notice does not establish completion for individual sites. It does not link separately reported outages or third-party unauthorized access to PHP.
What users should do
Check reopening notices for the website you use.
Official service URL
Source URLs
- PHP vulnerability responsehttps://www.corp-gakken.co.jp/newsrelease/info/2026/10/23/5895.htmlResponse evidence
Related official sources
- PHP vulnerability responseOfficial notice
- Company and operator informationOfficial information directory
Comments