JPCERT-AT-2026-0017
                                                             JPCERT/CC
                                                            2026-06-10

                 <<< JPCERT/CC Alert 2026-06-10 >>>

         Microsoft Releases June 2026 Security Updates

       https://www.jpcert.or.jp/english/at/2026/at260017.html


I. Overview
Microsoft has released June 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
    June 2026 Security Updates
    https://msrc.microsoft.com/update-guide/en-US/releaseNote/2026-Jun

Microsoft has announced that the following vulnerability, disclosed on
May 14, has been exploited in the wild. Please refer to the latest
information provided by Microsoft and implement the measures described
in "II. Solution."

    CVE-2026-42897
    Microsoft Exchange Server Spoofing Vulnerability
    https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-42897


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/