CS Accounting

1MinorInvestigatingAnnounced

A server was accessed without permission on May 5, 2026. A brute-force attack on passwords is thought to have taken over a system account. No leak has been confirmed.

This incident was imported from a dataset that compiles public announcements, and we are still checking it against the sources. Counts and causes will be updated after the check. Sources are in Japanese.

Cause
Account takeover
Occurred
2026-05-05
Operational impact
None

Tools for this kind of attack

Picked from the cause of the incident: tools that help you check your own systems for the same kind of weakness, or spot the warning signs.

Wazuh

Impact Local only
wazuh/wazuh

A free security platform (SIEM/XDR) that collects logs, configuration, and vulnerability data from agents on your endpoints and shows it all in one dashboard.

Purpose
Defense
Type
Self-hosted server
Difficulty
Advanced
License
CopyleftGPL-2.0（一部の構成要素は Apache-2.0）
Category
Vulnerability scanning / Forensics
Actively updatedstars17,410Last update 2026-10-24
Read the Wazuh review

Sources

  1. 【重要】弊社サーバーにおける不正アクセスに関する最終報告www.cs-acctg.com · Published 2026-05-15(opens in a new tab)