ウイングアーク1st（nest Portal）Data breach / unauthorized access incident
- Occurred on
- Unconfirmed
- Announced on
- October 8, 2026
- Severity
- AFinancial and HR records — information that easily translates into monetary damage.
- Scale
- 1,200 people
- Main impact
- Unauthorized use of Commune's administrator account may have allowed viewing or exfiltration of company names, job titles, personal names, contact details, etc., for an estimated 1,200 people, and nest Portal has been suspended.
- Information involved
- Email addressHome addressFull name
- Cause / key point
- Unauthorized access exploiting a flaw in Commune's system.
- Industry
- IT & telecom
- Listing / capital
- Listed company東証プライム 4432(ウイングアーク1st)
- Sources
- Last updated
- October 20, 2026
Stock price reaction to the disclosureウイングアーク1st / 東証プライム 4432
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Written & reviewed
Reviewed byYutaro SasaoFounder & CEO, MediaLeap Inc.
CEO of MediaLeap Inc. Working on both sides of web advertising and web media since 2013; founded the company in May 2025.
Review scope: cross-checking against primary sources (official and government announcements), verifying claims stay within the facts, and checking source attribution。Last reviewed:
Written by:Leak Watch editorial team (AI-assisted drafts verified against sources by the editorial team) · Reviewer profile · Request a correction
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Attack method classification: Unauthorized access (method undisclosed)(Breached, but the technique was not identified or disclosed)
Read the Unauthorized access (method undisclosed) guide and national trends →