SV-278234r1182195: Windows Server 2025 User Account Control (UAC) must, at a minimum, prompt administrators for consent on the secure desktop. | Microsoft Windows Server 2025 STIG SCAP Benchmark

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Assessment Title

Rule Text

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

Description

Discussion Text

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.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-001084

References

DPMS Target Microsoft Windows Server 2025 DISA DPMS Target Microsoft Windows Server 2025 5719

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

# Windows PowerShell
# Reconstructed from oval:mil.disa.stig.windows2025:def:278234
# Windows Server 2025 User Account Control (UAC) must, at a minimum, prompt administrators for consent on the secure desktop.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Verifies 'User Account Control: Behavior of the elevation prompt for administrators in Admin Approval Mode' is set to 'Prompt for consent on the secure desktop' or 'Prompt for credentials on the secure desktop'
# registry_object (registry_test)
function test_1 {
  return ((((@{String='reg_sz';ExpandString='reg_expand_sz';Binary='reg_binary';DWord='reg_dword';MultiString='reg_multi_sz';QWord='reg_qword';None='reg_none'}[(Get-Item -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System').GetValueKind('ConsentPromptBehaviorAdmin').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System' -Name 'ConsentPromptBehaviorAdmin' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'ConsentPromptBehaviorAdmin') -eq 1)) -or (((@{String='reg_sz';ExpandString='reg_expand_sz';Binary='reg_binary';DWord='reg_dword';MultiString='reg_multi_sz';QWord='reg_qword';None='reg_none'}[(Get-Item -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System').GetValueKind('ConsentPromptBehaviorAdmin').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System' -Name 'ConsentPromptBehaviorAdmin' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'ConsentPromptBehaviorAdmin') -eq 2)))
}

if (test_1) {
  Write-Output "PASS"
} else {
  Write-Output "FAIL"
}

Assessment Script Powered by AISyntax-verified

A standalone PowerShell script to assess this control automatically. Review before running it in your environment.

Syntax-checked as valid PowerShell. Not executed here — running it for real needs the actual ms_windows_server_2025 target this check assesses.

# OVAL Definition: oval:mil.disa.stig.windows2025:def:278234
if ((Get-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" -Name ConsentPromptBehaviorAdmin -ErrorAction SilentlyContinue).ConsentPromptBehaviorAdmin -eq 1 -or (Get-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" -Name ConsentPromptBehaviorAdmin -ErrorAction SilentlyContinue).ConsentPromptBehaviorAdmin -eq 2) { Write-Output "PASS"; Exit 0 } else { Write-Output "FAIL"; Exit 1 }

Remediation

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.