JPCERT-AT-2026-0020
                                                             JPCERT/CC
                                                            2026-07-15

                 <<< JPCERT/CC Alert 2026-07-15 >>>

            Microsoft Releases July 2026 Security Updates

       https://www.jpcert.or.jp/english/at/2026/at260020.html


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

    Microsoft Corporation
    July 2026 Security Updates
    https://msrc.microsoft.com/update-guide/en-US/releaseNote/2026-Jul

According to Microsoft, among the vulnerabilities, the following
vulnerabilities have 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-2026-56164
    Microsoft SharePoint Server Elevation of Privilege Vulnerability
    https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-56164

    CVE-2026-56155
    Active Directory Federation Services Elevation of Privilege Vulnerability
    https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-56155


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/