CVE-2021-34466

Windows Hello Security Feature Bypass Vulnerability

CVSS v3 5.7 MEDIUM
CVSS v2.0 3.6 LOW

5.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.5 / Impact : 5.2

Attack Vector PHYSICAL

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

3.6^/10

CVSS v2.0 : LOW

Vector : AV:L/AC:L/Au:N/C:P/I:P/A:N

Exploitability : 3.9 / Impact : 4.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34466
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34466	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:microsoft:windows_10:20h2:::::::*
	cpe:2.3:o:microsoft:windows_10:21h1:::::::*
	cpe:2.3:o:microsoft:windows_10:1809:::::::*
	cpe:2.3:o:microsoft:windows_10:1909:::::::*
	cpe:2.3:o:microsoft:windows_10:2004:::::::*

History

No history.

Information

Published : 2021-07-16 21:15

Updated : 2026-08-10 16:17

NVD link : CVE-2021-34466

Mitre link : CVE-2021-34466

CVE.ORG link : CVE-2021-34466

JSON object : View

Products Affected

microsoft

windows_10

CWE

CWE-290

Authentication Bypass by Spoofing

{"id": "CVE-2021-34466", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 3.6, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:N", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 4.9, "baseSeverity": "LOW", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Secondary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.7, "attackVector": "PHYSICAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 0.5}, {"type": "Secondary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "PHYSICAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 0.9}]}, "affected": [{"source": "secure@microsoft.com", "affectedData": [{"vendor": "Microsoft", "product": "Windows 10 Version 1809", "versions": [{"status": "affected", "version": "10.0.17763.0", "lessThan": "10.0.17763.2061", "versionType": "custom"}], "platforms": ["32-bit Systems", "x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows 10 Version 1809", "versions": [{"status": "affected", "version": "10.0.0", "lessThan": "10.0.17763.2061", "versionType": "custom"}], "platforms": ["ARM64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows 10 Version 1909", "versions": [{"status": "affected", "version": "10.0.0", "lessThan": "10.0.18363.1679", "versionType": "custom"}], "platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows 10 Version 2004", "versions": [{"status": "affected", "version": "10.0.0", "lessThan": "10.0.19041.1110", "versionType": "custom"}], "platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows 10 Version 20H2", "versions": [{"status": "affected", "version": "10.0.0", "lessThan": "10.0.19042.1110", "versionType": "custom"}], "platforms": ["32-bit Systems", "ARM64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows 10 Version 21H1", "versions": [{"status": "affected", "version": "10.0.0", "lessThan": "10.0.19043.1110", "versionType": "custom"}], "platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"]}]}], "published": "2021-07-16T21:15:10.070", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34466", "source": "secure@microsoft.com"}, {"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34466", "tags": ["Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-290"}]}], "descriptions": [{"lang": "en", "value": "Windows Hello Security Feature Bypass Vulnerability"}, {"lang": "es", "value": "Una vulnerabilidad de Omisi\u00f3n de la Funcionalidad de Seguridad de Windows Hello"}], "lastModified": "2026-08-10T16:17:48.117", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9E2C378B-1507-4C81-82F6-9F599616845A"}, {"criteria": "cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FAE4278F-71A7-43E9-8F79-1CBFAE71D730"}, {"criteria": "cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6B8F3DD2-A145-4AF1-8545-CC42892DA3D1"}, {"criteria": "cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E9273B95-20ED-4547-B0A8-95AD15B30372"}, {"criteria": "cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AAE74AF3-C559-4645-A6C0-25C3D647AAC8"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}