JPCERT-AT-2026-0010
                                                             JPCERT/CC
                                                            2026-04-15

                 <<< JPCERT/CC Alert 2026-04-15 >>>

         Microsoft Releases April 2026 Security Updates

       https://www.jpcert.or.jp/english/at/2026/at260010.html


I. Overview
Microsoft has released April 2026 Security Updates to address the
vulnerabilities in their products. Attackers leveraging these
vulnerabilities may be able to perform spoofing over a network, or
execute arbitrary code remotely without authentication, etc.

    Microsoft Corporation
    April 2026 Security Updates
    https://msrc.microsoft.com/update-guide/en-us/releaseNote/2026-Apr

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-2026-32201
    Microsoft SharePoint Server Spoofing Vulnerability
    https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-32201


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/