Windows Server 2019 must disable the Windows Installer Always install with elevated privileges option.

STIG ID: WN19-CC-000430  |  SRG: SRG-OS-000362-GPOS-00149 |  Severity: high |  CCI: CCI-001812 |  Vulnerability Id: V-205802 | 

Vulnerability Discussion

Standard user accounts must not be granted elevated privileges. Enabling Windows Installer to elevate privileges when installing applications can allow malicious persons and applications to gain full control of a system.

Check

If the following registry value does not exist or is not configured as specified, this is a finding:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SOFTWARE\Policies\Microsoft\Windows\Installer\

Value Name: AlwaysInstallElevated

Type: REG_DWORD
Value: 0x00000000 (0)

Fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Installer >> "Always install with elevated privileges" to "Disabled".
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