まんだらけ（通販配送情報）Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- August 30, 2026
- Severity
- SCompromise of deep personal data or usable credentials.
- Scale
- Unknown
- Main impact
- Detected unauthorized access, suspended online store orders and postponed auctions. The online store stopped taking orders through the month following detection, and reopening proceeded as announced.
- Information involved
- Email addressPhone numberHome addressFull name
- Cause / key point
- Cause is under investigation.
- Industry
- Retail & e-commerce
- Listing / capital
- Listed company東証スタンダード 2652(まんだらけ)
- Last updated
- October 20, 2026
Stock price reaction to the disclosureまんだらけ / 東証スタンダード 2652
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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: Unauthorized access (method undisclosed)(Breached, but the technique was not identified or disclosed)
Read the Unauthorized access (method undisclosed) guide and national trends →