Overview
A library vulnerability was exploited to obtain support-staff credentials, plant malicious programs that dumped databases, and log into other systems. The October 26 second report added 45 more affected systems (44 Cuenote FC, 1 Cuenote BASE). No overall total was found in the notices (count blank). Client-company impacts are recorded separately and must not be summed.
Timeline
- Occurred
- Discovered
- Disclosed
Intrusion found; servers isolated.
First report; police and PPC notified.
Second report added affected systems.
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
- 当社システムへの不正なアクセスに関するご報告（第一報 2026年10月19日 19:05更新版）ユミルリンク株式会社 · 2026-11-09
- 当社システムへの不正なアクセスに関するご報告（第二報）ユミルリンク株式会社 · 2026-11-09
- 当社システムへの不正なアクセスに関するご報告（第一報）ユミルリンク株式会社 · 2026-11-09