CVE-2021-27085

Internet Explorer Remote Code Execution Vulnerability

CVSS v3 8.8 HIGH
CVSS v2.0 7.6 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.3

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact HIGH

Availability Impact LOW

Scope CHANGED

7.6^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:H/Au:N/C:C/I:C/A:C

Exploitability : 4.9 / Impact : 10.0

Access Vector NETWORK

Access Complexity HIGH

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085	Patch Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085	Patch Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085

Configurations

Configuration 1 (hide)

AND

cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:*

OR	cpe:2.3:o:microsoft:windows_10_1803:-:::::::*
	cpe:2.3:o:microsoft:windows_10_1809:-:::::::*
	cpe:2.3:o:microsoft:windows_10_1909:-:::::::*
	cpe:2.3:o:microsoft:windows_10_2004:-:::::::*
	cpe:2.3:o:microsoft:windows_10_20h2:-:::::::*
	cpe:2.3:o:microsoft:windows_server_2019:-:::::::*

History

22 Oct 2025, 00:17

Type	Values Removed	Values Added
References		() https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085 -

21 Oct 2025, 20:18

Type	Values Removed	Values Added
References	~~{'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085', 'source': '134c704f-9b21-4f2e-91b3-4a467353bcc0'}~~

21 Oct 2025, 19:18

Type	Values Removed	Values Added
References		() https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085 -

Information

Published : 2021-03-11 16:15

Updated : 2025-10-22 00:17

NVD link : CVE-2021-27085

Mitre link : CVE-2021-27085

CVE.ORG link : CVE-2021-27085

JSON object : View

Products Affected

microsoft

windows_10_1909
internet_explorer
windows_10_1809
windows_10_20h2
windows_10_2004
windows_server_2019
windows_10_1803

CWE

NVD-CWE-noinfo

{"id": "CVE-2021-27085", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.6, "accessVector": "NETWORK", "vectorString": "AV:N/AC:H/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "HIGH", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "acInsufInfo": false, "impactScore": 10.0, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 4.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}], "cvssMetricV31": [{"type": "Secondary", "source": "secure@microsoft.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 5.3, "exploitabilityScore": 2.8}, {"type": "Secondary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/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": 2.8}]}, "published": "2021-03-11T16:15:18.677", "references": [{"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085", "tags": ["Patch", "Vendor Advisory"], "source": "secure@microsoft.com"}, {"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085", "tags": ["Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "Internet Explorer Remote Code Execution Vulnerability"}, {"lang": "es", "value": "Una Vulnerabilidad de Ejecuci\u00f3n de C\u00f3digo Remota de Internet Explorer"}], "lastModified": "2025-10-22T00:17:28.710", "cisaActionDue": "2021-11-17", "cisaExploitAdd": "2021-11-03", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D7809F78-8D56-4925-A8F9-4119B973A667"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "00345596-E9E0-4096-8DC6-0212F4747A13"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "2E332666-2E03-468E-BC30-299816D6E8ED"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "A1B570A8-ED1A-46B6-B8AB-064445F8FC4C"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_2004:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "D4DBE5B2-AE10-4251-BCDA-DC5EDEE6EE67"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_20h2:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "6AFD13A6-A390-4400-9029-2F4058CA17E2"}, {"criteria": "cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "DB79EE26-FC32-417D-A49C-A1A63165A968"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "secure@microsoft.com", "cisaRequiredAction": "Apply updates per vendor instructions.", "cisaVulnerabilityName": "Microsoft Internet Explorer Remote Code Execution Vulnerability"}