サイバー大学（履修登録・授業料手続き）Data breach / unauthorized access incident
- Occurred on
- October 7, 2026
- Announced on
- October 8, 2026
- Severity
- AFinancial and HR records — information that easily translates into monetary damage.
- Scale
- Unknown
- Main impact
- An IDCF outage disrupted course registration, tuition payments, and syllabus viewing, but Cloud Campus operated normally. No personal information leakage has been confirmed.
- Information involved
- User / member ID
- Cause / key point
- It is attributed to an outage of the cloud services of the provider IDCフロンティア. Public materials regarding unauthorized access to the subcontractor have been provided.About Supply chain attacks (via vendors & shared services)
- Industry
- Education
- Listing / capital
- Non-profit corporation
- Last updated
- October 20, 2026
Is this incident worth paying attention to?
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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: Supply chain attacks (via vendors & shared services)(Compromising the provider instead of the user)
Read the Supply chain attacks (via vendors & shared services) guide and national trends →