Windows Server 2019 User Account Control (UAC) must only elevate UIAccess applications that are installed in secure locations.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-205719	SRG-OS-000134-GPOS-00068	WN19-SO-000430	SV-205719r958518_rule	2025-02-25	3

Description
UAC is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting configures Windows to only allow applications installed in a secure location on the file system, such as the Program Files or the Windows\System32 folders, to run with elevated privileges.

ℹ️ Check
UAC requirements are NA for Server Core installations (this is the default installation option for Windows Server 2019 versus Server with Desktop Experience). 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\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: EnableSecureUIAPaths Value Type: REG_DWORD Value: 0x00000001 (1)

ℹ️ Check

UAC requirements are NA for Server Core installations (this is the default installation option for Windows Server 2019 versus Server with Desktop Experience). 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\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: EnableSecureUIAPaths Value Type: REG_DWORD Value: 0x00000001 (1)

✔️ Fix
Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "User Account Control: Only elevate UIAccess applications that are installed in secure locations" to "Enabled".