high
8
Advisory Published
Advisory Published
Updated

CVE-2021-31206: (Pwn2Own) Microsoft Exchange Server CabUtility ExtractCab Directory Traversal Remote Code Execution Vulnerability

First published: Wed Jul 14 2021(Updated: )

Microsoft Exchange Server Remote Code Execution Vulnerability

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

Affected SoftwareAffected VersionHow to fix
=2013-cumulative_update_23
=2016-cumulative_update_20
=2016-cumulative_update_21
=2019-cumulative_update_10
=2019-cumulative_update_9
Microsoft Exchange Server=2013-cumulative_update_23
Microsoft Exchange Server=2016-cumulative_update_20
Microsoft Exchange Server=2016-cumulative_update_21
Microsoft Exchange Server=2019-cumulative_update_10
Microsoft Exchange Server=2019-cumulative_update_9

Remedy

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31206

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-31206?

    CVE-2021-31206 is a vulnerability that allows network-adjacent attackers to execute arbitrary code on affected installations of Microsoft Exchange Server.

  • Is user interaction required to exploit CVE-2021-31206?

    Yes, user interaction is required to exploit this vulnerability.

  • How does the vulnerability in CVE-2021-31206 occur?

    The vulnerability in CVE-2021-31206 occurs within the parsing of CAB files.

  • Which products are affected by CVE-2021-31206?

    Microsoft Exchange Server 2013 (Cumulative Update 23), Microsoft Exchange Server 2016 (Cumulative Update 20 and Cumulative Update 21), and Microsoft Exchange Server 2019 (Cumulative Update 9 and Cumulative Update 10) are affected by CVE-2021-31206.

  • What is the severity of CVE-2021-31206?

    CVE-2021-31206 has a severity score of 8, which is considered high.

  • How can I fix CVE-2021-31206?

    To fix CVE-2021-31206, apply the relevant security updates provided by Microsoft.

  • Where can I find more information about CVE-2021-31206?

    You can find more information about CVE-2021-31206 on the Microsoft Security Response Center website and the Zero Day Initiative website.

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