7.5
CWE
918
Advisory Published
Updated

CVE-2023-21761: Microsoft Exchange Server Information Disclosure Vulnerability

First published: Tue Jan 10 2023(Updated: )

Microsoft Exchange Server Information Disclosure Vulnerability

Credit: secure@microsoft.com secure@microsoft.com

Affected SoftwareAffected VersionHow to fix
Microsoft Exchange Server=2016-cumulative_update_23
Microsoft Exchange Server=2019-cumulative_update_11
Microsoft Exchange Server=2019-cumulative_update_12
Microsoft Exchange Server 2016=23
Microsoft Exchange Server 2019=11
Microsoft Exchange Server 2019=12

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Frequently Asked Questions

  • What is CVE-2023-21761?

    CVE-2023-21761 is a vulnerability in Microsoft Exchange Server that allows for information disclosure.

  • What is the severity of CVE-2023-21761?

    CVE-2023-21761 has a severity rating of 7.5, which is considered high.

  • Which versions of Microsoft Exchange Server are affected by CVE-2023-21761?

    Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 11, and Microsoft Exchange Server 2019 Cumulative Update 12 are affected by CVE-2023-21761.

  • How can I fix CVE-2023-21761?

    To fix CVE-2023-21761, you can apply the patches provided by Microsoft, which are available at the following URLs: Microsoft Exchange Server 2016 - Cumulative Update 23 (https://www.microsoft.com/downloads/details.aspx?familyid=e775134a-a23b-4375-8be2-61123b4addd3) and Microsoft Exchange Server 2019 - Cumulative Update 11 (https://www.microsoft.com/downloads/details.aspx?familyid=ecb11461-88df-428b-b0a8-1fa9fa892b25) or Cumulative Update 12 (https://www.microsoft.com/downloads/details.aspx?familyid=6237df2d-0ad0-415d-8b98-a8c985ed6214).

  • Where can I find more information about CVE-2023-21761?

    You can find more information about CVE-2023-21761 on the Microsoft Security Response Center website at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21761.

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