JPCERT-AT-2021-0048
                                                             JPCERT/CC
                                                            2021-11-10

                 <<< JPCERT/CC Alert 2021-11-10 >>>

          Microsoft Releases November 2021 Security Updates

       https://www.jpcert.or.jp/english/at/2021/at210048.html


I. Overview
Microsoft has released November 2021 Security Updates to address the
vulnerabilities in their products. Remote attackers leveraging
these vulnerabilities may be able to execute arbitrary code. It is
recommended to check the information provided by Microsoft and
apply the updates.

    Microsoft Corporation
    November 2021 Security Updates
    https://msrc.microsoft.com/update-guide/en-us/releaseNote/2021-Nov

    Microsoft Corporation
    Microsoft Security Updates for November 2021 (Monthly) (Japanese)
    https://msrc-blog.microsoft.com/2021/11/09/202111-security-updates/

According to Microsoft, among these vulnerabilities, the following two
vulnerabilities have been confirmed to be exploited in the wild. Please
consider applying the security update programs as soon as possible.

    CVE-2021-42292
    Microsoft Excel Security Feature Bypass Vulnerability
    https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2021-42292

    CVE-2021-42321
    Microsoft Exchange Server Remote Code Execution Vulnerability
    https://msrc.microsoft.com/update-guide/en-us/vulnerability/CVE-2021-42321


II. Solution
Please apply the security update programs through Microsoft Update,
Windows Update, etc. as soon as possible.

    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/releaseNote


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/