ヨネックス公式オンラインショップData breach / unauthorized access incident
- Occurred on
- August 5, 2026
- Announced on
- August 12, 2026
- Severity
- SCompromise of deep personal data or usable credentials.
- Scale
- 1 people
- Main impact
- Unauthorized logins were confirmed for 3 accounts; in one case, name, address, purchase history, and other data may have been viewed.
- Information involved
- Home addressFull nameDate of birth
- Cause / key point
- Cause is under investigation.About Abuse of credentials
- Industry
- Retail & e-commerce
- Listing / capital
- Listed company東証スタンダード 7906(ヨネックス)
- Last updated
- October 20, 2026
Stock price reaction to the disclosureヨネックス / 東証スタンダード 7906
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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 →