Getting and setting WMI security in PowerShell uses the same approach as share security. WMI permissions might be set using wmimgmt.msc if the GUI is used. The content of the DACL differs slightly.

The __SystemSecurity class is used to access the security descriptor. Each WMI namespace has its own instance of the __SystemSecurity class; an example is as follows:

Get-CimClass __SystemSecurity -Namespace root 
Get-CimClass __SystemSecurity -Namespace rootcimv2