Confirmed

United Arrows: partner-list personal data of about 10,000 people leaked after ex-employee removal

An employee who left at end-December 2025 removed partner lists via a cloud external-link feature; discovered in January 2026 and disclosed March 16.

Last updated: 2026-11-09

Overview

Notice says “about 10,000 people” so count blank. Name, employer, department, phone, email and workplace address. External transfer from the new-employer PC assessed as unlikely.

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. 【3/17情報更新】お取引先様の個人情報漏えいに関するお詫びとご報告株式会社ユナイテッドアローズ · 2026-11-09

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