JPCERT-AT-2025-0022
                                                             JPCERT/CC
                                                            2025-10-15

                 <<< JPCERT/CC Alert 2025-10-15 >>>

         Microsoft Releases October 2025 Security Updates

       https://www.jpcert.or.jp/english/at/2025/at250022.html


I. Overview
Microsoft has released October 2025 Security Updates to address the
vulnerabilities in their products. Remote attackers leveraging
these vulnerabilities may be able to execute arbitrary code.

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

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

    CVE-2025-24990
    Windows Agere Modem Driver Elevation of Privilege Vulnerability
    https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-24990

    CVE-2025-47827
    MITRE CVE-2025-47827: Secure Boot bypass in IGEL OS before 11
    https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2025-47827

    CVE-2025-59230
    Windows Remote Access Connection Manager Elevation of Privilege Vulnerability
    https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-59230

Additionally, Microsoft announced that support for Windows 10 has ended on
October 14, 2025. As security updates for Windows 10 will no longer be
provided, please consider measures such as upgrading to Windows 11.

    Microsoft Corporation
    Windows 10 support has ended on October 14, 2025
    https://support.microsoft.com/en-us/windows/windows-10-support-has-ended-on-october-14-2025-2ca8b313-1946-43d3-b55c-2b95b107f281


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/