The built-in administrator account must be disabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-253432	WN11-SO-000005	SV-253432r829380_rule		Medium

Description
The built-in administrator account is a well-known account subject to attack. It also provides no accountability to individual administrators on a system. It must be disabled to prevent its use.

STIG	Date
Microsoft Windows 11 Security Technical Implementation Guide	2022-06-24

Details

Check Text ( C-56885r829378_chk )
Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options. If the value for "Accounts: Administrator account status" is not set to "Disabled", this is a finding.

Fix Text (F-56835r829379_fix)
Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Accounts: Administrator account status" to "Disabled".