Microsoft Windows Server 2019 Security Technical Implementation Guide

The Microsoft Windows Server 2019 Security Technical Implementation Guide (V3 R9) has 282 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V3 · R9

CurrentPublished Wed Jul 01 2026

Windows Server 2019 must not allow anonymous enumeration of Security Account Manager (SAM) accounts.

Microsoft Windows Server 2019 Security Technical Implementation Guide

Assessment Title

Rule Text

Windows Server 2019 must not allow anonymous enumeration of Security Account Manager (SAM) accounts.

Description

Discussion Text

Anonymous enumeration of SAM accounts allows anonymous logon users (null session connections) to list all accounts names, thus providing a list of potential points to attack the system.

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-205914

Rule

SV-205914r991589_rule

Severity

high

Rule Version

WN19-SO-000220

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

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: \SYSTEM\CurrentControlSet\Control\Lsa\

Value Name: RestrictAnonymousSAM

Value Type: REG_DWORD
Value: 0x00000001 (1)

Implementation Procedure

Fix Text

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network access: Do not allow anonymous enumeration of SAM accounts" to "Enabled".

STIG check 259 of 282 in the Microsoft Windows Server 2019 STIG checklist

← Previous · V-205913Windows Server 2019 must not allow anonymous SID/Name translation.Next · V-205915 →Windows Server 2019 must be configured to prevent anonymous users from having the same permissions as the Everyone group.