The built-in guest account must be disabled.

From Windows 8/8.1 Security Technical Implementation Guide

Part of Disable Guest Account

Associated with: CCI-000804

SV-48034r1_rule The built-in guest account must be disabled.

Vulnerability discussion

A system faces an increased vulnerability threat if the built-in guest account is not disabled. This account is a known account that exists on all Windows systems and cannot be deleted. This account is initialized during the installation of the operating system with no password assigned.

Check content

Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.) Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> Security Options. If the value for "Accounts: Guest account status" is not set to "Disabled", this is a finding.

Fix text

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Accounts: Guest account status" to "Disabled".

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