Details
The built-in local guest account is another well-known name to attackers. It is recommended to rename this account to something that does not indicate its purpose. Even if you disable this account, which is recommended, ensure that you rename it for added security. On Domain Controllers, since they do not have their own local accounts, this rule refers to the built-in Guest account that was established when the domain was first created.
Rationale:
The Guest account exists on all computers that run the Windows 2000 or newer operating systems. If you rename this account, it is slightly more difficult for unauthorized persons to guess this privileged user name and password combination.
Impact:
There should be little impact, because the Guest account is disabled by default.
Solution
To establish the recommended configuration via GP, configure the following UI path:
Computer ConfigurationPoliciesWindows SettingsSecurity SettingsLocal PoliciesSecurity OptionsAccounts: Rename guest account
Default Value:
Guest.
Additional Information:
Microsoft Windows Server 2019 Security Technical Implementation Guide:
Version 2, Release 1, Benchmark Date: November 13, 2020
Vul ID: V-205910
Rule ID: SV-205910r569188_rule
STIG ID: WN19-SO-000040
Severity: CAT II
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: Configuration Management, Identification and Authentication.This control applies to the following type of system Windows.