CVE-2021-27085 (GCVE-0-2021-27085)
Vulnerability from cvelistv5
Published
2021-03-11 15:46
Modified
2025-10-21 23:25
Severity ?
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L/E:P/RL:O/RC:C
CWE
  • Remote Code Execution
Summary
Internet Explorer Remote Code Execution Vulnerability
References
Impacted products
Vendor Product Version
Microsoft Internet Explorer 11 Version: 1.0.0   < publication
    cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:*
 Create a notification for this product.
CISA Known Exploited Vulnerability
Data from the CISA Known Exploited Vulnerabilities Catalog

Date added: 2021-11-03

Due date: 2021-11-17

Required action: Apply updates per vendor instructions.

Used in ransomware: Unknown

Notes: https://nvd.nist.gov/vuln/detail/CVE-2021-27085

Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T20:40:47.045Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-27085",
                "options": [
                  {
                    "Exploitation": "active"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-03-15T17:51:05.710614Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          },
          {
            "other": {
              "content": {
                "dateAdded": "2021-11-03",
                "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085"
              },
              "type": "kev"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "description": "CWE-noinfo Not enough information",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-21T23:25:52.044Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "government-resource"
            ],
            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2021-11-03T00:00:00+00:00",
            "value": "CVE-2021-27085 added to CISA KEV"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:*"
          ],
          "platforms": [
            "Windows 10 Version 1803 for 32-bit Systems",
            "Windows 10 Version 1803 for x64-based Systems",
            "Windows 10 Version 1803 for ARM64-based Systems",
            "Windows 10 Version 1809 for 32-bit Systems",
            "Windows 10 Version 1809 for x64-based Systems",
            "Windows 10 Version 1809 for ARM64-based Systems",
            "Windows Server 2019",
            "Windows 10 Version 1909 for 32-bit Systems",
            "Windows 10 Version 1909 for x64-based Systems",
            "Windows 10 Version 1909 for ARM64-based Systems",
            "Windows 10 Version 2004 for 32-bit Systems",
            "Windows 10 Version 2004 for ARM64-based Systems",
            "Windows 10 Version 2004 for x64-based Systems",
            "Windows 10 Version 20H2 for 32-bit Systems",
            "Windows 10 Version 20H2 for ARM64-based Systems"
          ],
          "product": "Internet Explorer 11",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "publication",
              "status": "affected",
              "version": "1.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "datePublic": "2021-03-09T08:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Internet Explorer Remote Code Execution Vulnerability"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L/E:P/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Remote Code Execution",
              "lang": "en-US",
              "type": "Impact"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-12-29T20:09:31.347Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085"
        }
      ],
      "title": "Internet Explorer Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
    "assignerShortName": "microsoft",
    "cveId": "CVE-2021-27085",
    "datePublished": "2021-03-11T15:46:59.000Z",
    "dateReserved": "2021-02-10T00:00:00.000Z",
    "dateUpdated": "2025-10-21T23:25:52.044Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "cisa_known_exploited": {
      "cveID": "CVE-2021-27085",
      "dateAdded": "2021-11-03",
      "dueDate": "2021-11-17",
      "knownRansomwareCampaignUse": "Unknown",
      "notes": "https://nvd.nist.gov/vuln/detail/CVE-2021-27085",
      "product": "Internet Explorer",
      "requiredAction": "Apply updates per vendor instructions.",
      "shortDescription": "Microsoft Internet Explorer contains an unspecified vulnerability that allows for remote code execution.",
      "vendorProject": "Microsoft",
      "vulnerabilityName": "Microsoft Internet Explorer Remote Code Execution Vulnerability"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-27085\",\"sourceIdentifier\":\"secure@microsoft.com\",\"published\":\"2021-03-11T16:15:18.677\",\"lastModified\":\"2025-10-22T00:17:28.710\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"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\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"secure@microsoft.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":2.8,\"impactScore\":5.3},{\"source\":\"nvd@nist.gov\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:H/Au:N/C:C/I:C/A:C\",\"baseScore\":7.6,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"HIGH\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"COMPLETE\",\"integrityImpact\":\"COMPLETE\",\"availabilityImpact\":\"COMPLETE\"},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":4.9,\"impactScore\":10.0,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":true}]},\"cisaExploitAdd\":\"2021-11-03\",\"cisaActionDue\":\"2021-11-17\",\"cisaRequiredAction\":\"Apply updates per vendor instructions.\",\"cisaVulnerabilityName\":\"Microsoft Internet Explorer Remote Code Execution Vulnerability\",\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"D7809F78-8D56-4925-A8F9-4119B973A667\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"00345596-E9E0-4096-8DC6-0212F4747A13\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2E332666-2E03-468E-BC30-299816D6E8ED\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:microsoft:windows_10_1909:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A1B570A8-ED1A-46B6-B8AB-064445F8FC4C\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:microsoft:windows_10_2004:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D4DBE5B2-AE10-4251-BCDA-DC5EDEE6EE67\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:microsoft:windows_10_20h2:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"6AFD13A6-A390-4400-9029-2F4058CA17E2\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"DB79EE26-FC32-417D-A49C-A1A63165A968\"}]}]}],\"references\":[{\"url\":\"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085\",\"source\":\"secure@microsoft.com\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Vendor Advisory\"]},{\"url\":\"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085\",\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\"}]}}",
    "vulnrichment": {
      "containers": "{\"cna\": {\"title\": \"Internet Explorer Remote Code Execution Vulnerability\", \"datePublic\": \"2021-03-09T08:00:00.000Z\", \"affected\": [{\"vendor\": \"Microsoft\", \"product\": \"Internet Explorer 11\", \"cpes\": [\"cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:*\"], \"platforms\": [\"Windows 10 Version 1803 for 32-bit Systems\", \"Windows 10 Version 1803 for x64-based Systems\", \"Windows 10 Version 1803 for ARM64-based Systems\", \"Windows 10 Version 1809 for 32-bit Systems\", \"Windows 10 Version 1809 for x64-based Systems\", \"Windows 10 Version 1809 for ARM64-based Systems\", \"Windows Server 2019\", \"Windows 10 Version 1909 for 32-bit Systems\", \"Windows 10 Version 1909 for x64-based Systems\", \"Windows 10 Version 1909 for ARM64-based Systems\", \"Windows 10 Version 2004 for 32-bit Systems\", \"Windows 10 Version 2004 for ARM64-based Systems\", \"Windows 10 Version 2004 for x64-based Systems\", \"Windows 10 Version 20H2 for 32-bit Systems\", \"Windows 10 Version 20H2 for ARM64-based Systems\"], \"versions\": [{\"version\": \"1.0.0\", \"lessThan\": \"publication\", \"versionType\": \"custom\", \"status\": \"affected\"}]}], \"descriptions\": [{\"value\": \"Internet Explorer Remote Code Execution Vulnerability\", \"lang\": \"en-US\"}], \"problemTypes\": [{\"descriptions\": [{\"description\": \"Remote Code Execution\", \"lang\": \"en-US\", \"type\": \"Impact\"}]}], \"providerMetadata\": {\"orgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"shortName\": \"microsoft\", \"dateUpdated\": \"2023-12-29T20:09:31.347Z\"}, \"references\": [{\"tags\": [\"x_refsource_MISC\"], \"url\": \"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085\"}], \"metrics\": [{\"format\": \"CVSS\", \"scenarios\": [{\"lang\": \"en-US\", \"value\": \"GENERAL\"}], \"cvssV3_1\": {\"version\": \"3.1\", \"baseSeverity\": \"HIGH\", \"baseScore\": 8.8, \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L/E:P/RL:O/RC:C\"}}]}, \"adp\": [{\"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-03T20:40:47.045Z\"}, \"title\": \"CVE Program Container\", \"references\": [{\"tags\": [\"x_refsource_MISC\", \"x_transferred\"], \"url\": \"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085\"}]}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-27085\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"active\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-03-15T17:51:05.710614Z\"}}}, {\"other\": {\"type\": \"kev\", \"content\": {\"dateAdded\": \"2021-11-03\", \"reference\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085\"}}}], \"references\": [{\"url\": \"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085\", \"tags\": [\"government-resource\"]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"description\": \"CWE-noinfo Not enough information\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-02-04T19:14:20.311Z\"}, \"timeline\": [{\"time\": \"2021-11-03T00:00:00+00:00\", \"lang\": \"en\", \"value\": \"CVE-2021-27085 added to CISA KEV\"}], \"title\": \"CISA ADP Vulnrichment\"}]}",
      "cveMetadata": "{\"assignerOrgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"assignerShortName\": \"microsoft\", \"cveId\": \"CVE-2021-27085\", \"datePublished\": \"2021-03-11T15:46:59.000Z\", \"dateReserved\": \"2021-02-10T00:00:00.000Z\", \"dateUpdated\": \"2025-10-21T19:54:08.079Z\", \"state\": \"PUBLISHED\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.