Windows Server 2022 Windows Remote Management (WinRM) service must not allow unencrypted traffic.

Severity
Group ID
Group Title
Version
Rule ID
Date
STIG Version
mediumV-254382SRG-OS-000393-GPOS-00173WN22-CC-000510SV-254382r958848_rule2025-02-252
Description
Unencrypted remote access to a system can allow sensitive information to be compromised. Windows remote management connections must be encrypted to prevent this. Satisfies: SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174
ℹ️ Check
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\WinRM\Service\ Value Name: AllowUnencryptedTraffic Type: REG_DWORD Value: 0x00000000 (0)
✔️ Fix
Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Remote Management (WinRM) >> WinRM Service >> Allow unencrypted traffic to "Disabled".