日本ICTテレコムユーザー協会（eラーニング）Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- October 9, 2026
- Severity
- AFinancial and HR records — information that easily translates into monetary damage.
- Scale
- Unknown
- Main impact
- An attack on IDCF caused failures in sending notification emails to course participants. Learning activities were not affected, and it is being investigated whether names and email addresses provided at registration were leaked.
- Information involved
- Email addressFull name
- Cause / key point
- The cause is attributed to unauthorized third-party access to IDCフロンティア's cloud service, described as a ransomware attack. To prevent secondary damage or leaks, the affected network areas were isolated and systems were shut down.About Ransomware
- Industry
- Education
- Listing / capital
- Non-profit corporation
Association-operated e-learning
- Last updated
- October 20, 2026
Is this incident worth paying attention to?
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Same attack method
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Attack method classification: Ransomware(Encrypting data and demanding a ransom)
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