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V-278234

CAT II (Medium)

Windows Server 2025 User Account Control (UAC) must, at a minimum, prompt administrators for consent on the secure desktop.

Rule ID

SV-278234r1182195_rule

STIG

Microsoft Windows Server 2025 Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-001084

Discussion

UAC is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting configures the elevation requirements for logged-on administrators to complete a task that requires raised privileges.

Check Content

UAC requirements are not applicable for Server Core installations (this is the default installation option for Windows Server 2025 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: ConsentPromptBehaviorAdmin

Value Type: REG_DWORD
Value: 0x00000002 (2) (Prompt for consent on the secure desktop)
0x00000001 (1) (Prompt for credentials on the secure desktop)

Fix Text

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> User Account Control: Behavior of the elevation prompt for administrators in Admin Approval Mode to "Prompt for consent on the secure desktop".

The more secure option for this setting, "Prompt for credentials on the secure desktop", would also be acceptable.