Bypassing Microsoft Defender SmartScreen prompts for sites must be disabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-235720	EDGE-00-000002	SV-235720r960852_rule		Medium

Description
This policy setting allows a decision to be made on whether users can override the Microsoft Defender SmartScreen warnings about potentially malicious websites. If this setting is enabled, users cannot ignore Microsoft Defender SmartScreen warnings, and are blocked from continuing to the site. If this setting is disabled or not configured, users can ignore Microsoft Defender SmartScreen warnings and continue to the site.

Description

This policy setting allows a decision to be made on whether users can override the Microsoft Defender SmartScreen warnings about potentially malicious websites. If this setting is enabled, users cannot ignore Microsoft Defender SmartScreen warnings, and are blocked from continuing to the site. If this setting is disabled or not configured, users can ignore Microsoft Defender SmartScreen warnings and continue to the site.

STIG	Date
Microsoft Edge Security Technical Implementation Guide	2024-06-10

Details

Check Text ( C-38939r766830_chk )
The policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/SmartScreen settings/Prevent bypassing Microsoft Defender SmartScreen prompts for sites" must be set to "Enabled". Use the Windows Registry Editor to navigate to the following key: HKLM\SOFTWARE\Policies\Microsoft\Edge If the value for "PreventSmartScreenPromptOverride" is not set to "REG_DWORD = 1", this is a finding. If this machine is on SIPRNet, this is Not Applicable.

Check Text ( C-38939r766830_chk )

The policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/SmartScreen settings/Prevent bypassing Microsoft Defender SmartScreen prompts for sites" must be set to "Enabled".

Use the Windows Registry Editor to navigate to the following key:
HKLM\SOFTWARE\Policies\Microsoft\Edge

If the value for "PreventSmartScreenPromptOverride" is not set to "REG_DWORD = 1", this is a finding.

If this machine is on SIPRNet, this is Not Applicable.

Fix Text (F-38902r766831_fix)
Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/SmartScreen settings/Prevent bypassing Microsoft Defender SmartScreen prompts for sites" to "Enabled".