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QUO Card: LINE official-account campaign system intrusion may have exposed display names and prize info

Third-party intrusion into the LINE official-account campaign-only system; LINE display names and campaign prize info for some customers may have been viewed or exfiltrated; disclosed Sep 29, 2026. Counts under review. No payment/bank/sensitive data on that system.

Last updated: 2026-11-09

Overview

Counts under review → blank.

Timeline

  1. Occurred
  2. Discovered
  3. Disclosed

Organization response

Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.

What you can do

Be wary of emails, SMS or calls impersonating the organisation; do not open links or attachments or enter passwords or card details. Change reused passwords on other services.

Sources

  1. 当社LINE公式アカウント キャンペーンシステムへの不正アクセスに関するお詫びとお知らせ株式会社クオカード · 2026-11-09

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