ハイホー（BiZiMo・光ギガ等）Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- October 8, 2026
- Severity
- SCompromise of deep personal data or usable credentials.
- Scale
- 38,509 records
- Main impact
- There was an incident in which third parties used information obtained by phone calls, etc., to impersonate users and log into マイページ; the affected total has been disclosed as 38,509 contracts.
- Information involved
- Email addressPhone numberHome addressFull name
- Cause / key point
- The cause is under investigation.
- Industry
- IT & telecom
- Listing / capital
- Unlisted
- 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
Related incidents
Browse the database →Incidents sharing the same company, service, attack method or industry (grouped automatically from the disclosures).
Same industry
- SSEストアー(ショップサーブ)2026.10.16 announced・Affected 23,356,000 people
- SSソースネクスト2026.10.15 announced・Affected 22,519,960 records
- SSコミューン（Commune・Commune for Work）2026.10.09 announced・Affected 307,000 people
- SSIDCフロンティア（IDCFクラウド）2026.10.07 announced・Affected 48 records
- SS楽天ドライブ2026.10.06 announced・Affected 15,382 accounts
- SSHelpfeel（Gyazo）2026.09.16 announced・Affected 23,620,000 records
Attack method classification: Under investigation / not stated(Cause not disclosed)
Read the Under investigation / not stated guide and national trends →