Overview
Portfolio and securities-account data not included. No count published (count blank). No intrusion into Nomura systems confirmed. This stems from the Ymir Link Cuenote FC intrusion (recorded separately); the figure is a subset of the vendor scope and must not be added to it.
Timeline
- Occurred
- Discovered
- 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
- 金融機関等向けポートフォリオ管理ツール「i-Port」に関するメール配信業務の外部委託先における情報漏えいの可能性について野村證券株式会社 · 2026-11-09