ファイバーゲート（クラウド利用サービス）Data breach / unauthorized access incident
- Occurred on
- October 7, 2026
- Announced on
- October 9, 2026
- Severity
- AFinancial and HR records — information that easily translates into monetary damage.
- Scale
- Unknown
- Main impact
- Due to an attack on IDCF, some functions such as Wi‑Fi authentication, email, and administrative sites were suspended. There was no impact on Internet connectivity, and data leakage has not been confirmed.
- Information involved
- Email addressUser / member ID
- Cause / key point
- It is attributed to a ransomware attack on the contracted provider IDCFクラウド, which prompted network disconnections and system shutdowns to prevent further spread and data leakage.About Ransomware
- Industry
- IT & telecom
- Listing / capital
- Listed company東証スタンダード 9450(ファイバーゲート)
- Last updated
- October 20, 2026
Stock price reaction to the disclosureファイバーゲート / 東証スタンダード 9450
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Written & reviewed
Reviewed byYutaro SasaoFounder & CEO, MediaLeap Inc.
CEO of MediaLeap Inc. Working on both sides of web advertising and web media since 2013; founded the company in May 2025.
Review scope: cross-checking against primary sources (official and government announcements), verifying claims stay within the facts, and checking source attribution。Last reviewed:
Written by:Leak Watch editorial team (AI-assisted drafts verified against sources by the editorial team) · Reviewer profile · Request a correction
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Attack method classification: Ransomware(Encrypting data and demanding a ransom)
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