CVE-2021-40442

Microsoft Excel Remote Code Execution Vulnerability

CVSS v3 7.8 HIGH
CVSS v2.0 6.8 MEDIUM

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40442
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40442	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:microsoft:365_apps:-::::enterprise:::
	cpe:2.3:a:microsoft:excel:2013:sp1::::::
	cpe:2.3:a:microsoft:excel:2016:::::::*
	cpe:2.3:a:microsoft:office:2019:::::-::
	cpe:2.3:a:microsoft:office:2019:::::macos::
	cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:::::-::
	cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:::::macos::
	cpe:2.3:a:microsoft:office_online_server:-:::::::*
	cpe:2.3:a:microsoft:office_web_apps_server:2013:sp1::::::
	cpe:2.3:a:microsoft:sharepoint_enterprise_server:2013:sp1::::::

History

No history.

Information

Published : 2021-11-10 01:19

Updated : 2026-08-19 17:17

NVD link : CVE-2021-40442

Mitre link : CVE-2021-40442

CVE.ORG link : CVE-2021-40442

JSON object : View

Products Affected

microsoft

office_web_apps_server
office
office_long_term_servicing_channel
excel
365_apps
sharepoint_enterprise_server
office_online_server

CWE

NVD-CWE-noinfo

{"id": "CVE-2021-40442", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 6.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}], "cvssMetricV31": [{"type": "Secondary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}, {"type": "Secondary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "secure@microsoft.com", "affectedData": [{"vendor": "Microsoft", "product": "Microsoft 365 Apps for Enterprise", "versions": [{"status": "affected", "version": "16.0.1", "lessThan": "https://aka.ms/OfficeSecurityReleases", "versionType": "custom"}], "platforms": ["32-bit Systems", "x64-based Systems"]}, {"vendor": "Microsoft", "product": "Microsoft Excel 2013 Service Pack 1", "versions": [{"status": "affected", "version": "15.0.0.0", "lessThan": "15.0.5397.1001", "versionType": "custom"}], "platforms": ["32-bit Systems", "ARM64-based Systems", "x64-based Systems"]}, {"vendor": "Microsoft", "product": "Microsoft Excel 2016", "versions": [{"status": "affected", "version": "16.0.0.0", "lessThan": "16.0.5239.1001", "versionType": "custom"}], "platforms": ["32-bit Systems", "x64-based Systems"]}, {"vendor": "Microsoft", "product": "Microsoft Office 2019", "versions": [{"status": "affected", "version": "19.0.0", "lessThan": "https://aka.ms/OfficeSecurityReleases", "versionType": "custom"}], "platforms": ["32-bit Systems", "x64-based Systems"]}, {"vendor": "Microsoft", "product": "Microsoft Office 2019 for Mac", "versions": [{"status": "affected", "version": "16.0.0", "lessThan": "16.55.21111400", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": "Microsoft Office LTSC 2021", "versions": [{"status": "affected", "version": "16.0.1", "lessThan": "https://aka.ms/OfficeSecurityReleases", "versionType": "custom"}], "platforms": ["32-bit Systems", "x64-based Systems"]}, {"vendor": "Microsoft", "product": "Microsoft Office LTSC for Mac 2021", "versions": [{"status": "affected", "version": "16.0.1", "lessThan": "16.55.21111400", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": "Microsoft Office Online Server", "versions": [{"status": "affected", "version": "16.0.1", "lessThan": "16.0.10380.20000", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": "Microsoft Office Web Apps Server 2013 Service Pack 1", "versions": [{"status": "affected", "version": "15.0.1", "lessThan": "15.0.5397.1001", "versionType": "custom"}]}, {"vendor": "Microsoft", "product": "Microsoft SharePoint Enterprise Server 2013 Service Pack 1", "versions": [{"status": "affected", "version": "15.0.0", "lessThan": "15.0.5397.1001", "versionType": "custom"}], "platforms": ["x64-based Systems"]}]}], "published": "2021-11-10T01:19:18.077", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-40442", "source": "secure@microsoft.com"}, {"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40442", "tags": ["Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "Microsoft Excel Remote Code Execution Vulnerability"}, {"lang": "es", "value": "Una vulnerabilidad de Ejecuci\u00f3n de C\u00f3digo Remota de Microsoft Excel"}], "lastModified": "2026-08-19T17:17:54.550", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*", "vulnerable": true, "matchCriteriaId": "40C15EDD-98D4-4D06-BA06-21AE0F33C72D"}, {"criteria": "cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F564117D-450D-45C4-9688-AF35F630A8A7"}, {"criteria": "cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "09BF0981-749E-470B-A7AC-95AD087797EF"}, {"criteria": "cpe:2.3:a:microsoft:office:2019:*:*:*:*:-:*:*", "vulnerable": true, "matchCriteriaId": "C5282C83-86B8-442D-851D-B54E88E8B1F1"}, {"criteria": "cpe:2.3:a:microsoft:office:2019:*:*:*:*:macos:*:*", "vulnerable": true, "matchCriteriaId": "40961B9E-80B6-42E0-A876-58B3CE056E4E"}, {"criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:*:*", "vulnerable": true, "matchCriteriaId": "6C9D7C93-E8CB-4A8A-BA15-093B03ACC62F"}, {"criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*", "vulnerable": true, "matchCriteriaId": "BF0E8112-5B6F-4E55-8E40-38ADCF6FC654"}, {"criteria": "cpe:2.3:a:microsoft:office_online_server:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E98AE986-FA31-4301-8025-E8915BA4AC5E"}, {"criteria": "cpe:2.3:a:microsoft:office_web_apps_server:2013:sp1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "941B16A2-931D-4031-A016-5EA60E87BE20"}, {"criteria": "cpe:2.3:a:microsoft:sharepoint_enterprise_server:2013:sp1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A5D3A185-BE57-403E-914E-FDECEC3A477C"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}