BPossible leakAugust 6, 2026 announced

ナイス株式会社Data breach / unauthorized access incident

Reviewed by Yutaro SasaoWritten by Leak Watch editorial teamAugust 6, 2026 published ・ October 20, 2026 updated

Occurred on: Unconfirmed
Announced on: August 6, 2026
Severity: BIncidents centered on names and contact details.
Scale: 2,400 records
Main impact: They detected suspicious activity on managed email addresses and blocked external access by changing passwords and similar measures; the publicly reported impact is about 2,400 records.
Information involved: Email addressPhone numberHome addressFull name
Cause / key point: They report that suspicious activity on managed email addresses led to external access.
Industry: Services & other
Listing / capital: Listed company東証スタンダード 8089(ナイス)
Sources: メールアドレスへの不正アクセスによる個人情報漏洩の可能性について 2026-08-06
Last updated: October 20, 2026

Stock price reaction to the disclosureナイス / 東証スタンダード 8089

2026.07.17 〜 2026.08.27Loading…

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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: October 20, 2026

Written by:Leak Watch editorial team (AI-assisted drafts verified against sources by the editorial team) · Reviewer profile · Request a correction