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Windows Server 2025 default permissions for the HKEY_LOCAL_MACHINE registry hive must be maintained.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-278001WN25-00-000170SV-278001r1181950_ruleCCI-002235medium
Description
The registry is integral to the function, security, and stability of the Windows system. Changing the system's registry permissions allows the possibility of unauthorized and anonymous modification to the operating system.
STIGDate
Microsoft Windows Server 2025 Security Technical Implementation Guide2026-02-20

Related Frameworks

1 mapping across 4 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

IAC-21.5Prohibit Non-Privileged Users from Executing Privileged Functions
1.00
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (50) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-2(1)Automated System Account Management
1.00
AC-2(10)Shared and Group Account Credential Change
1.00
AC-2(2)Automated Temporary and Emergency Account Management
1.00
AC-2(3)Disable Accounts
1.00
AC-2(4)Automated Audit Actions
1.00
AC-3Access Enforcement
1.00
AC-3(4)Discretionary Access Control
1.00
AC-3(7)Role-based Access Control
1.00
AC-4Information Flow Enforcement
1.00
AC-6(10)Prohibit Non-privileged Users from Executing Privileged Functions
1.00

+40 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.1.7
1.00
CCI1 mapping
CCI-002235
1.00

Details

Check Text (C-278001r1181950_chk)

Review the registry permissions for the keys of the HKEY_LOCAL_MACHINE hive noted below. If any nonprivileged groups such as Everyone, Users, or Authenticated Users have greater than Read permission, this is a finding. If permissions are not as restrictive as the default permissions listed below, this is a finding. Run "Regedit". Right-click on the registry areas noted below. Select "Permissions", and then click "Advanced". HKEY_LOCAL_MACHINE\SECURITY Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to SYSTEM - Full Control - This key and subkeys Administrators - Special - This key and subkeys HKEY_LOCAL_MACHINE\SOFTWARE Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to Users - Read - This key and subkeys Administrators - Full Control - This key and subkeys SYSTEM - Full Control - This key and subkeys CREATOR OWNER - Full Control - This key and subkeys ALL APPLICATION PACKAGES - Read - This key and subkeys HKEY_LOCAL_MACHINE\SYSTEM Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to Authenticated Users - Read - This key and subkeys Administrators - Full Control - This key and subkeys SYSTEM - Full Control - This key and subkeys CREATOR OWNER - Full Control - This key and Subkeys ALL APPLICATION PACKAGES - Read - This key and subkeys Server Operators - Read - This Key and subkeys (Domain controllers only) Other examples under the noted keys may also be sampled. There may be some instances where nonprivileged groups have greater than Read permission. Microsoft has given Read permission to the SOFTWARE and SYSTEM registry keys in Windows Server 2025 to the following SID. This is not a finding. S-1-15-3-1024-1065365936-1281604716-3511738428-1654721687-432734479-3232135806-4053264122-3456934681 If the defaults have not been changed, this is not a finding.

Fix Text (F-82436r1181949_fix)

Maintain the default permissions for the HKEY_LOCAL_MACHINE registry hive. The default permissions of the higher-level keys are noted below: HKEY_LOCAL_MACHINE\SECURITY Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to SYSTEM - Full Control - This key and subkeys Administrators - Special - This key and subkeys HKEY_LOCAL_MACHINE\SOFTWARE Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to Users - Read - This key and subkeys Administrators - Full Control - This key and subkeys SYSTEM - Full Control - This key and subkeys CREATOR OWNER - Full Control - This key and subkeys ALL APPLICATION PACKAGES - Read - This key and subkeys HKEY_LOCAL_MACHINE\SYSTEM Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to Authenticated Users - Read - This key and subkeys Administrators - Full Control - This key and subkeys SYSTEM - Full Control - This key and subkeys CREATOR OWNER - Full Control - This key and subkeys ALL APPLICATION PACKAGES - Read - This key and subkeys Server Operators - Read - This Key and subkeys (Domain controllers only) Microsoft has given Read permission to the SOFTWARE and SYSTEM registry keys in Windows Server 2025 to the following SID: S-1-15-3-1024-1065365936-1281604716-3511738428-1654721687-432734479-3232135806-4053264122-3456934681