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JAENES
APossible leakOctober 21, 2026 announced

デジタルアーツ（クラウドサービス運用環境）Data breach / unauthorized access incident

笹尾 祐太朗の写真Reviewed by Yutaro SasaoWritten by Leak Watch editorial team published ・ updated
Occurred on
Unconfirmed
Announced on
October 21, 2026
Severity
AFinancial and HR records — information that easily translates into monetary damage.
Scale
Unknown
Main impact
Credentials used to operate cloud services were illicitly obtained by a third party and intrusion into the service operational environment using them was confirmed. Discovered during an AI-assisted comprehensive inspection on 2026年10月9日, with traces of unauthorized access dating back to around 2025年7月頃; affected services are 「i-FILTER@Cloud」「m-FILTER@Cloud（Modern Edition）」「m-FILTER MailAdviser Microsoft 365対応版」「FINAL CODE@Cloud」「z-FILTER」「Desk」, some customer information may have been viewed by a third party (types of information not identified at time of disclosure); at disclosure there were no confirmed reports of data exfiltration, misuse, or secondary damage, and the compromised credentials were invalidated/exchanged, suspicious programs stopped, server authentication keys replaced, and all users of the affected cloud services were requested to change their passwords.
Information involved
Not specified in the disclosure
Cause / key point
Illicit acquisition of cloud service operational credentials by a third party and subsequent intrusion into the operational environment using those credentials.About Abuse of credentials
Industry
IT & telecom
Listing / capital
Listed company東証プライム 2326.T
Sources
Last updated
October 23, 2026

Stock price reaction to the disclosureデジタルアーツ（クラウドサービス運用環境） / 東証プライム 2326.T

2026.10.01 〜 2026.10.23Loading…

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Written & reviewed

笹尾 祐太朗の写真

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: Abuse of credentials(Logging in legitimately with leaked or guessed passwords)

Read the Abuse of credentials guide and national trends →

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