ACCESS（台湾子会社のCROS）Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- October 15, 2026
- Severity
- SCompromise of deep personal data or usable credentials.
- Scale
- 155,280 records
- Main impact
- Unauthorized access to CROS provided by ACCESS's Taiwan subsidiary resulted in the leakage of customer IDs 155,280 and order IDs 231,998, etc. Card information was partially confirmed (1,305 accounts after deduplication, of which 4 accounts include security codes).
- Information involved
- Email addressUser / member IDAuth tokenCard & payment dataPhone numberHome addressFull name
- Cause / key point
- The cause is under investigation.
- Industry
- IT & telecom
- Listing / capital
- Listed company東証プライム 4813(ACCESS)
- Last updated
- October 20, 2026
Stock price reaction to the disclosureACCESS / 東証プライム 4813
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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 →