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Test-CVE-2021-34470.ps1

Download the latest release: Test-CVE-2021-34470.ps1

Environments running supported versions of Exchange Server should address CVE-2021-34470 by applying the CU and/or SU for the respective versions of Exchange, as described in Released: July 2021 Exchange Server Security Updates.

Environments where the latest version of Exchange Server is any version before Exchange 2013, or environments where all Exchange servers have been removed, can use this script to address the vulnerability.

Examples

Check for the vulnerability:

.\Test-CVE-2021-34470.ps1

Fix the vulnerability if found:

.\Test-CVE-2021-34470.ps1 -ApplyFix

Note that the user must be a Schema Admin to use the -ApplyFix switch.