En JapanMiddle no Tenshoku

1MinorInvestigatingAnnounced

Credential-stuffing attacks caused 2,503 unauthorized logins, which may have given access to member information pages.

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
2026-05-26 – 2026-06-02
Sector
IT, cloud & telecom
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. 「ミドルの転職」への不正アクセス発生に関するお詫びとご報告 | エン株式会社（en Inc.）corp.en-japan.com · Published 2026-06-05(opens in a new tab)