Weathercaster Network: its website was broken into and defaced; data of members and course applicants in up to 15,959 records may have leaked
The website of a weathercaster group was broken into and defaced; up to 15,959 records from sign-ups, course applications and inquiries since December 2018 may have leaked.
Disclosed
2026-10-06
Organizations involved
1
Leaked or at risk
16K
15,959
Downtime
Unknown
What happened
Impact
Up to 15,959 records from membership sign-ups and changes, applications for courses and other events, and the contact form since December 2018: names and email addresses, some with addresses and phone numbers. [1]
Response
It reported to the Personal Information Protection Commission and is preparing an outside investigation. The site will return once it is confirmed safe. [1]
Timeline
- Started 2026-09-24
- Detected 2026-09-27
- Disclosed 2026-10-06
- 12 days
Attack or cause
- Method
- [Intrusion]
- Impact
- [Data leak][Site defacement][Service outage]
- Entry point
- Web app
Data exposed or at risk
Organizations involved
[Breached][Major]Tokyo, TaitoOther services15,959 leaked
Weathercaster Network
Sources
- [1][Official]弊会ウェブサイト不正アクセスによる個人情報漏えいの可能性に関するお詫びとお知らせWeathercaster Network · 2026-10-06