Investigating

Ishikawa Computer Center: 14,071 external email addresses may have leaked after attachment-mail server intrusion

Possible data leak: Vulnerability abuse on an attachment-separation mail server was recognised May 14, 2026 and disclosed May 19; the final report still found no confirmed theft but listed definitive at-risk fields.

Last updated: 2026-11-09

Overview

Count stores 14,071 unique non-company emails in logs. Attachment-mail subset (1,929) not summed.

Timeline

UnknownOccurred
2026-05-14Discovered
2026-05-19Disclosed

Organization response

Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.

What you can do

Be wary of emails, SMS or calls impersonating the organisation; do not open links or attachments or enter passwords or card details. Change reused passwords on other services.

Sources

不正アクセスによる情報漏えいの可能性に関するお詫びとお知らせ株式会社石川コンピュータ・センター · 2026-11-09
不正アクセスによる情報漏えいの可能性に関するお詫びとお知らせ(最終報)株式会社石川コンピュータ・センター · 2026-11-09
不正アクセスによる情報漏えいの可能性に関するお詫びとお知らせ（第二報）株式会社石川コンピュータ・センター · 2026-11-09

Ishikawa Computer Center: 14,071 external email addresses may have leaked after attachment-mail server intrusion

Overview

Timeline

Organization response

What you can do

Sources

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