STIGQter: STIG Summary: Microsoft Windows 11 Security Technical Implementation Guide Version: 2 Release: 8 Benchmark Date: 01 Jul 2026:

Windows 11 must be configured to prioritize ECC Curves with longer key lengths first.

DISA Rule

SV-253363r971535_rule

Vulnerability Number

V-253363

Group Title

SRG-OS-000120-GPOS-00061

Rule Version

WN11-CC-000052

Severity

CAT II

CCI(s)

• CCI-000803 - Implement mechanisms for authentication to a cryptographic module that meet the requirements of applicable laws, Executive Orders, directives, policies, regulations, standards, and guidance for such authentication.

Weight

10

Fix Recommendation

Configure the policy value for Computer Configuration >> Administrative Templates >> Network >> SSL Configuration Settings >> "ECC Curve Order" to "Enabled" with "ECC Curve Order:" including the following in the order listed:

NistP384
NistP256

Check Contents

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\Cryptography\Configuration\SSL\00010002\

Value Name: EccCurves

Value Type: REG_MULTI_SZ
Value: NistP384 NistP256

Vulnerability Number

V-253363

Documentable

False

Rule Version

WN11-CC-000052

Severity Override Guidance

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\Cryptography\Configuration\SSL\00010002\

Value Name: EccCurves

Value Type: REG_MULTI_SZ
Value: NistP384 NistP256

Check Content Reference

M

Target Key

5471