JPCERT-AT-2026-0031
                                                             JPCERT/CC
                                                            2026-10-14

                 <<< JPCERT/CC Alert 2026-10-14 >>>

         Microsoft Releases October 2026 Security Updates

       https://www.jpcert.or.jp/english/at/2026/at260031.html


I. Overview
Microsoft has released October 2026 Security Updates to address the
vulnerabilities in their products. Attackers leveraging these
vulnerabilities may be able to execute arbitrary code remotely
without authentication or bypass security features, etc.

    Microsoft Corporation
    October 2026 Security Updates
    https://msrc.microsoft.com/update-guide/releaseNote/2026-Oct

According to Microsoft, among the vulnerabilities, the following
vulnerability has been confirmed to be exploited in the wild. Please
refer to the latest information provided by Microsoft and implement
the measures described in "II. Solution."

    CVE-2026-96951
    Windows Shell Security Feature Bypass Vulnerability
    https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96951


II. Solution
Please apply the security update programs through Microsoft Update, Windows
Update, etc.

    Microsoft Update Catalog
    https://www.catalog.update.microsoft.com/

    Windows Update: FAQ
    https://support.microsoft.com/en-us/help/12373/windows-update-faq


III. References
    Microsoft Corporation
    Release Notes
    https://msrc.microsoft.com/update-guide/


If you have any information regarding this alert, please contact
JPCERT/CC.

======================================================================
JPCERT Coordination Center (Cyber Security Coordination Group)
MAIL: ew-info@jpcert.or.jp
https://www.jpcert.or.jp/english/