ウエーブ（Webアップロード）Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- April 1, 2026
- Severity
- AFinancial and HR records — information that easily translates into monetary damage.
- Scale
- 176,810 records
- Main impact
- Up to 176,810 names, email addresses, customer IDs, and print submission data and estimate/quotation documents may have been exposed. No traces of external transfer or database access have been confirmed.
- Information involved
- Email addressUser / member IDFull name
- Cause / key point
- Unauthorized access via a brute-force attack against an SSH server.About Abuse of credentials
- Industry
- IT & telecom
- Listing / capital
- Unlisted
- Sources
- Last updated
- October 20, 2026
Is this incident worth paying attention to?
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: Abuse of credentials(Logging in legitimately with leaked or guessed passwords)
Read the Abuse of credentials guide and national trends →