Local users on domain-joined computers must not be enumerated.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-220820 | WN10-CC-000130 | SV-220820r958478_rule | CCI-000381 | medium |
| Description | ||||
| The username is one part of logon credentials that could be used to gain access to a system. Preventing the enumeration of users limits this information to authorized personnel. | ||||
| STIG | Date | |||
| Microsoft Windows 10 Security Technical Implementation Guide | 2025-02-25 | |||
Details
Check Text (C-220820r958478_chk)
This requirement is applicable to domain-joined systems. For standalone or nondomain-joined systems, this is NA.
If the following registry value does not exist or is not configured as specified, this is a finding:
Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SOFTWARE\Policies\Microsoft\Windows\System\
Value Name: EnumerateLocalUsers
Value Type: REG_DWORD
Value: 0
Fix Text (F-22524r857193_fix)
This requirement is applicable to domain-joined systems. For standalone or nondomain-joined systems, this is NA.
Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Logon >> "Enumerate local users on domain-joined computers" to "Disabled".