Windows Server 2019 built-in guest account must be renamed.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-205910 | WN19-SO-000040 | SV-205910r991589_rule | CCI-000366 | medium |
| Description | ||||
| The built-in guest account is a well-known user account on all Windows systems and, as initially installed, does not require a password. This can allow access to system resources by unauthorized users. Renaming this account to an unidentified name improves the protection of this account and the system. | ||||
| STIG | Date | |||
| Microsoft Windows Server 2019 Security Technical Implementation Guide | 2025-05-23 | |||
Related Frameworks
4 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
CM-6
1.00
- DISA · 3 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1712 mappings
3.4.1
1.00
- DISA · 3 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
3.4.2
1.00
- DISA · 3 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-000366
1.00
- DISA · 3 · disa_xccdf · related
Details
Check Text (C-205910r991589_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: Rename guest account" is not set to a value other than "Guest", this is a finding.
For server core installations, run the following command:
Secedit /Export /Areas SecurityPolicy /CFG C:\Path\FileName.Txt
If "NewGuestName" is not something other than "Guest" in the file, this is a finding.
Fix Text (F-6175r356093_fix)
Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Accounts: Rename guest account" to a name other than "Guest".