> JapanHacked_Cybersecurity incidents in Japan

Company

Mynavi Corporation

Mynavi Corporation (Chiyoda, Tokyo; Information and communications) appears in 2 related cybersecurity incidents. The latest was disclosed on 2026-02-12.

Profile

Industry/type: Information and communications
Location: Tokyo, Chiyoda
Website: https://www.mynavi.jp/

Public figures

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Metric	Value		As of	Source
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Incident history

Disclosed 2026-02-12Updated 2026-10-23Tokyo[Contained][Severity: Major][Breached][Major]
Mynavi: unauthorized access to a cloud service it uses
[Unknown][Data leak]Leaked 74.2KOrganizations 1
Disclosed 2025-10-03Updated 2026-10-23Tokyo[Contained][Severity: Major][Breached][Major]
Mynavi: device management cloud misconfiguration
[Misconfiguration][Data leak]Leaked 14.8KOrganizations 1

		Incident	Role	Impact level				Methods	Impacts		Status
2026-02-12	2026-10-23	Mynavi: unauthorized access to a cloud service it uses	[Breached]	[Major]	[Major]	1 Mynavi Corporation	Tokyo	[Unknown]	[Data leak]	74,224	[Contained]
2025-10-03	2026-10-23	Mynavi: device management cloud misconfiguration	[Breached]	[Major]	[Major]	1 Mynavi Corporation	Tokyo	[Misconfiguration]	[Data leak]	14,762	[Contained]