Exploited
high
7.8
CWE
22
Advisory Published
Updated

CVE-2021-27065: Microsoft Exchange Server Remote Code Execution Vulnerability

First published: Tue Mar 02 2021(Updated: )

Microsoft Exchange Server contains an unspecified vulnerability that allows for remote code execution. This vulnerability is part of the ProxyLogon exploit chain.

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

Affected SoftwareAffected VersionHow to fix
Microsoft Exchange Server=2013-cumulative_update_22
Microsoft Exchange Server=2013-cumulative_update_23
Microsoft Exchange Server=2013-sp1
Microsoft Exchange Server=2016-cumulative_update_10
Microsoft Exchange Server=2016-cumulative_update_11
Microsoft Exchange Server=2016-cumulative_update_12
Microsoft Exchange Server=2016-cumulative_update_13
Microsoft Exchange Server=2016-cumulative_update_14
Microsoft Exchange Server=2016-cumulative_update_15
Microsoft Exchange Server=2016-cumulative_update_16
Microsoft Exchange Server=2016-cumulative_update_17
Microsoft Exchange Server=2016-cumulative_update_18
Microsoft Exchange Server=2016-cumulative_update_19
Microsoft Exchange Server=2016-cumulative_update_8
Microsoft Exchange Server=2016-cumulative_update_9
Microsoft Exchange Server=2019
Microsoft Exchange Server=2019-cumulative_update_1
Microsoft Exchange Server=2019-cumulative_update_2
Microsoft Exchange Server=2019-cumulative_update_4
Microsoft Exchange Server=2019-cumulative_update_5
Microsoft Exchange Server=2019-cumulative_update_6
Microsoft Exchange Server=2019-cumulative_update_7
Microsoft Exchange Server=2019-cumulative_update_8
Microsoft Exchange Server=2013-cumulative_update_21
Microsoft Exchange Server=2019-cumulative_update_3
Microsoft Exchange Server
=2013-cumulative_update_21
=2013-sp1
=2016-cumulative_update_10
=2016-cumulative_update_11
=2016-cumulative_update_12
=2016-cumulative_update_13
=2016-cumulative_update_14
=2016-cumulative_update_15
=2016-cumulative_update_16
=2016-cumulative_update_17
=2016-cumulative_update_18
=2016-cumulative_update_19
=2016-cumulative_update_8
=2019
=2019-cumulative_update_1
=2019-cumulative_update_2
=2019-cumulative_update_3
=2019-cumulative_update_4
=2019-cumulative_update_5
=2019-cumulative_update_6
=2019-cumulative_update_7
=2019-cumulative_update_8

Remedy

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27065

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Reference Links

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is CVE-2021-27065?

    CVE-2021-27065 is a remote code execution vulnerability in Microsoft Exchange Server.

  • How does CVE-2021-27065 impact Microsoft Exchange Server?

    CVE-2021-27065 allows an attacker to remotely execute code on a vulnerable Microsoft Exchange Server.

  • What is the severity of CVE-2021-27065?

    CVE-2021-27065 has a severity rating of 7.8 (high).

  • Which versions of Microsoft Exchange Server are affected by CVE-2021-27065?

    CVE-2021-27065 affects Microsoft Exchange Server 2013, 2016, and 2019.

  • How can I mitigate CVE-2021-27065?

    To mitigate CVE-2021-27065, apply the security updates provided by Microsoft and follow the recommended mitigation measures.

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