JPCERT-AT-2025-0025
                                                             JPCERT/CC
                                                            2025-12-10

                 <<< JPCERT/CC Alert 2025-12-10 >>>

         Microsoft Releases December 2025 Security Updates

       https://www.jpcert.or.jp/english/at/2025/at250025.html


I. Overview
Microsoft has released December 2025 Security Updates to address the
vulnerabilities in their products. Attackers leveraging these
vulnerabilities may be able to gain SYSTEM privileges.

    Microsoft Corporation
    December 2025 Security Updates
    https://msrc.microsoft.com/update-guide/en-us/releaseNote/2025-Dec

According to Microsoft, among the vulnerabilities, the following
vulnerability has been confirmed to be exploited in the wild. Please
consider applying the security update programs by referring to
the information provided by Microsoft.

    CVE-2025-62221
    Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
    https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-62221


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 (Early Warning Group)
MAIL: ew-info@jpcert.or.jp
https://www.jpcert.or.jp/english/