Vulnerability-Lookup

CVE-2021-27085 (GCVE-0-2021-27085)

Vulnerability from cvelistv5 – Published: 2021-03-11 15:46 – Updated: 2026-08-19 16:30

CISA Previdian

Title

Internet Explorer Remote Code Execution Vulnerability

Summary

Internet Explorer Remote Code Execution Vulnerability

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

SSVC

Exploitation: active Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-03-15 17:51 UTC

CWE

Remote Code Execution
CWE-noinfo Not enough information

Assigner

microsoft mitre root

References

3 references

URL	Tags
https://msrc.microsoft.com/update-guide/vulnerabi…	vendor-advisorypatch
https://portal.msrc.microsoft.com/en-US/security-…	x_refsource_MISCx_transferred
https://www.cisa.gov/known-exploited-vulnerabilit…	government-resource

Impacted products

1 product

Vendor	Product	Version	CPE status
Microsoft	Internet Explorer 11	Affected: 1.0.0 , < 10.0.17134.2087 (custom) cpe:2.3:a:microsoft:internet_explorer::-::::::*

Date Public

2021-03-09 16:00

CISA

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: b7439daa-64bf-4036-b29e-8bf27c4fc7ac

Vulnerability ID: CVE-2021-27085

Status: Confirmed

Status Updated: 2021-11-03 00:00 UTC

Exploited: Yes

Timestamps

First Seen: 2021-11-03

Asserted: 2021-11-03

Scope

Notes: KEV entry: Microsoft Internet Explorer Remote Code Execution Vulnerability | Affected: Microsoft / Internet Explorer | Description: Microsoft Internet Explorer contains an unspecified vulnerability that allows for remote code execution. | Required action: Apply updates per vendor instructions. | Due date: 2021-11-17 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-27085

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details

Cwes
Feed	CISA Known Exploited Vulnerabilities Catalog
Product	Internet Explorer
Due Date	2021-11-17
Date Added	2021-11-03
Vendorproject	Microsoft
Vulnerabilityname	Microsoft Internet Explorer Remote Code Execution Vulnerability
Knownransomwarecampaignuse	Unknown

References

CVE-2021-27085

Created: 2026-02-02 12:28 UTC | Updated: 2026-02-06 07:17 UTC

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

KEV entry ID: bf8f06e2-23e0-43c3-a2d4-f73538d9f82b

Vulnerability ID: CVE-2021-27085

Status: Confirmed

Status Updated: 2021-11-03 00:00 UTC

Exploited: Yes

Timestamps

First Seen: 2021-11-03

Asserted: 2021-11-03

Scope

Notes: KEVIntel entry: Internet Explorer Remote Code Execution Vulnerability | Affected: Microsoft / Internet Explorer 11 | CVSS: 8.8 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: False

Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details

Feed	KEVIntel (kevintel.com)
Title	Internet Explorer Remote Code Execution Vulnerability
Vendor	Microsoft
Product	Internet Explorer 11
Added Date	2021-11-03T00:00:00.000Z
Cvss Score	8.8
Epss Score	None
Cvss Severity	HIGH
Epss Percentile	None
Used In Malware	unknown
Ahead Of Cisa Kev	None
Not Yet In Cisa Kev	False

References

Created: 2026-06-23 14:04 UTC | Updated: 2026-07-10 06:14 UTC

Show details on NVD website

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To clipboard

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            ],
            "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085"
          },
          {
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "tags": [
              "US Government Resource"
            ],
            "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085"
          }
        ],
        "sourceIdentifier": "secure@microsoft.com",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-03-27T14:26:50+00:00",
      "cve": "CVE-2021-27085",
      "id": "CVE-2021-27085",
      "initial_release_date": "2021-03-09T08:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Internet Explorer Remote Code Execution Vulnerability",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-27085.json",
      "version": "3"
    },
    "vulnrichment": {
      "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": "2025-02-04T19:14:20.311Z",
              "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": "2021-11-03T00:00:00.000Z",
                "value": "CVE-2021-27085 added to CISA KEV"
              }
            ],
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "platforms": [
                "Windows 10 Version 1803 for 32-bit Systems",
                "Windows 10 Version 1803 for ARM64-based Systems",
                "Windows 10 Version 1803 for x64-based Systems",
                "Windows 10 Version 1809 for 32-bit Systems",
                "Windows 10 Version 1809 for ARM64-based Systems",
                "Windows 10 Version 1809 for x64-based Systems",
                "Windows 10 Version 1909 for 32-bit Systems",
                "Windows 10 Version 1909 for ARM64-based Systems",
                "Windows 10 Version 1909 for x64-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",
                "Windows Server 2019"
              ],
              "product": "Internet Explorer 11",
              "vendor": "Microsoft",
              "versions": [
                {
                  "lessThan": "10.0.17134.2087",
                  "status": "affected",
                  "version": "1.0.0",
                  "versionType": "custom"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:a:microsoft:internet_explorer:*:-:*:*:*:*:*:*",
                      "versionEndExcluding": "10.0.17134.2087",
                      "versionStartIncluding": "1.0.0",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "datePublic": "2021-03-09T16:00:00.000Z",
          "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": "2026-08-19T16:30:52.537Z",
            "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
            "shortName": "microsoft"
          },
          "references": [
            {
              "name": "Internet Explorer Remote Code Execution Vulnerability",
              "tags": [
                "vendor-advisory",
                "patch"
              ],
              "url": "https://msrc.microsoft.com/update-guide/vulnerability/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": "2026-08-19T16:30:52.537Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

CERTFR-2021-AVI-178

Vulnerability from certfr_avis - Published: - Updated:

De multiples vulnérabilités ont été corrigées dans Microsoft IE. Elles permettent à un attaquant de provoquer une exécution de code à distance.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

	Vendor	Product	Description
	Microsoft	N/A	Internet Explorer 9
	Microsoft	N/A	Internet Explorer 11

References

Title

Publication Time

CERTFR-2021-AVI-178

Vulnerability from certfr_avis - Published: - Updated:

De multiples vulnérabilités ont été corrigées dans Microsoft IE. Elles permettent à un attaquant de provoquer une exécution de code à distance.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

	Vendor	Product	Description
	Microsoft	N/A	Internet Explorer 9
	Microsoft	N/A	Internet Explorer 11

References

Title

Publication Time

BDU:2021-01365 (CVE-2021-27085)

Vulnerability from fstec – Published: 2021-03-17 – Updated: 2024-09-24 – View on bdu.fstec.ru Exploit exists Yes Fixed

CISA Previdian

Title

Уязвимость браузера Internet Explorer, связанная с недостаточной проверкой вводимых данных, позволяющая нарушителю выполнить произвольный код

Summary

Уязвимость браузера Internet Explorer связана с недостаточной проверкой вводимых данных. Эксплуатация уязвимости может позволить нарушителю, действующему удаленно, выполнить произвольный код

Severity

9.0 (High) CVSS 2.0


                      
                        AV:N/AC:L/Au:S/C:C/I:C/A:C

8.8 (High) CVSS 3.0


                      
                        CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Resource manipulation

Incidents

Yes

Remediation

Software update

CWE

CWE-20 - Недостаточная проверка вводимых данных

Aliases

CVE-2021-27085

References

3 references

URL
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27085
https://www.cybersecurity-help.cz/vulnerabilities/51356/
https://www.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv

Impacted products

1 product from 1 vendor

Vendors

Microsoft Corp

Products

Internet Explorer

Versions

11 (Internet Explorer)

Product types

Application software

Platforms

Microsoft Corp Windows 10 1803 - 64-bit, Microsoft Corp Windows 10 1803 - 32-bit, Microsoft Corp Windows 10 1809 - 64-bit, Microsoft Corp Windows 10 1809 - 32-bit, Microsoft Corp Windows Server 2019 -, Microsoft Corp Windows 10 1809 - ARM64, Microsoft Corp Windows 10 1803 - ARM64, Microsoft Corp Windows 10 1909 - 32-bit, Microsoft Corp Windows 10 1909 - 64-bit, Microsoft Corp Windows 10 1909 - ARM64, Microsoft Corp Windows 10 2004 - 32-bit, Microsoft Corp Windows 10 2004 - 64-bit, Microsoft Corp Windows 10 2004 - ARM64, Microsoft Corp Windows 10 20H2 - ARM64, Microsoft Corp Windows 10 20H2 - 32-bit, Microsoft Corp Windows 10 20H2 - 64-bit

Mitigations

Использование рекомендаций: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27085

JSON

To clipboard

{
  "CVSS 2.0": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
  "CVSS 3.0": "AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Microsoft Corp",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "11 (Internet Explorer)",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439:\nhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27085",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "09.03.2021",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "24.09.2024",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "17.03.2021",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2021-01365",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2021-27085",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "Internet Explorer",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": "Microsoft Corp Windows 10 1803 - 64-bit, Microsoft Corp Windows 10 1803 - 32-bit, Microsoft Corp Windows 10 1809 - 64-bit, Microsoft Corp Windows 10 1809 - 32-bit, Microsoft Corp Windows Server 2019 - , Microsoft Corp Windows 10 1809 - ARM64, Microsoft Corp Windows 10 1803 - ARM64, Microsoft Corp Windows 10 1909 - 32-bit, Microsoft Corp Windows 10 1909 - 64-bit, Microsoft Corp Windows 10 1909 - ARM64, Microsoft Corp Windows 10 2004 - 32-bit, Microsoft Corp Windows 10 2004 - 64-bit, Microsoft Corp Windows 10 2004 - ARM64, Microsoft Corp Windows 10 20H2 - ARM64, Microsoft Corp Windows 10 20H2 - 32-bit, Microsoft Corp Windows 10 20H2 - 64-bit",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430 Internet Explorer, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0430\u044f \u0441 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u043e\u0439 \u0432\u0432\u043e\u0434\u0438\u043c\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0439 \u043a\u043e\u0434",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0421\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u0430\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0430 \u0432\u0432\u043e\u0434\u0438\u043c\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445 (CWE-20)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0431\u0440\u0430\u0443\u0437\u0435\u0440\u0430 Internet Explorer \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e\u0439 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u043e\u0439 \u0432\u0432\u043e\u0434\u0438\u043c\u044b\u0445 \u0434\u0430\u043d\u043d\u044b\u0445. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e, \u0434\u0435\u0439\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u043c\u0443 \u0443\u0434\u0430\u043b\u0435\u043d\u043d\u043e, \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0439 \u043a\u043e\u0434",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041c\u0430\u043d\u0438\u043f\u0443\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u0441\u0443\u0440\u0441\u0430\u043c\u0438",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27085\nhttps://www.cybersecurity-help.cz/vulnerabilities/51356/\nhttps://www.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041f\u0440\u0438\u043a\u043b\u0430\u0434\u043d\u043e\u0435 \u041f\u041e \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-20",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 9)\n\u0412\u044b\u0441\u043e\u043a\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 8,8)"
}

FKIE_CVE-2021-27085

Vulnerability from fkie_nvd - Published: 2021-03-11 16:15 - Updated: 2026-08-19 19:22

CISA Previdian

Severity

8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Summary

Internet Explorer Remote Code Execution Vulnerability

References

URL	Tags
secure@microsoft.com	https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27085	Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085	Patch, Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0	https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085	US Government Resource

Impacted products

Vendor	Product	Version
microsoft	internet_explorer	11
microsoft	windows_10_1803	-
microsoft	windows_10_1809	-
microsoft	windows_10_1909	-
microsoft	windows_10_2004	-
microsoft	windows_10_20h2	-
microsoft	windows_server_2019	-

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "platforms": [
            "Windows 10 Version 1803 for 32-bit Systems",
            "Windows 10 Version 1803 for ARM64-based Systems",
            "Windows 10 Version 1803 for x64-based Systems",
            "Windows 10 Version 1809 for 32-bit Systems",
            "Windows 10 Version 1809 for ARM64-based Systems",
            "Windows 10 Version 1809 for x64-based Systems",
            "Windows 10 Version 1909 for 32-bit Systems",
            "Windows 10 Version 1909 for ARM64-based Systems",
            "Windows 10 Version 1909 for x64-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",
            "Windows Server 2019"
          ],
          "product": "Internet Explorer 11",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17134.2087",
              "status": "affected",
              "version": "1.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "secure@microsoft.com"
    }
  ],
  "cisaActionDue": "2021-11-17",
  "cisaExploitAdd": "2021-11-03",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "Microsoft Internet Explorer Remote Code Execution Vulnerability",
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:*",
              "matchCriteriaId": "D7809F78-8D56-4925-A8F9-4119B973A667",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "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",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "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"
    }
  ],
  "id": "CVE-2021-27085",
  "lastModified": "2026-08-19T19:22:43.240",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "HIGH",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 7.6,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:N/AC:H/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 4.9,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.3,
        "source": "secure@microsoft.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-27085",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-03-15T17:51:05.710614Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2021-03-11T16:15:18.677",
  "references": [
    {
      "source": "secure@microsoft.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27085"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "US Government Resource"
      ],
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085"
    }
  ],
  "sourceIdentifier": "secure@microsoft.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-VM76-5X29-7JX8

Vulnerability from github – Published: 2022-05-24 17:44 – Updated: 2026-08-19 18:31

Details

Internet Explorer Remote Code Execution Vulnerability

Severity

8.8 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2021-27085"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-03-11T16:15:00Z",
    "severity": "HIGH"
  },
  "details": "Internet Explorer Remote Code Execution Vulnerability",
  "id": "GHSA-vm76-5x29-7jx8",
  "modified": "2026-08-19T18:31:35Z",
  "published": "2022-05-24T17:44:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-27085"
    },
    {
      "type": "WEB",
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-27085"
    },
    {
      "type": "WEB",
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085"
    },
    {
      "type": "WEB",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-27085"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L",
      "type": "CVSS_V3"
    }
  ]
}

GSD-2021-27085

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

Internet Explorer Remote Code Execution Vulnerability

Aliases

CVE-2021-27085

Aliases

CVE-2021-27085

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2021-27085",
    "description": "Internet Explorer Remote Code Execution Vulnerability",
    "id": "GSD-2021-27085"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-27085"
      ],
      "details": "Internet Explorer Remote Code Execution Vulnerability",
      "id": "GSD-2021-27085",
      "modified": "2023-12-13T01:23:35.940451Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cisa.gov": {
      "cveID": "CVE-2021-27085",
      "dateAdded": "2021-11-03",
      "dueDate": "2021-11-17",
      "product": "Internet Explorer",
      "requiredAction": "Apply updates per vendor instructions.",
      "shortDescription": "Internet Explorer Remote Code Execution Vulnerability",
      "vendorProject": "Microsoft",
      "vulnerabilityName": "Internet Explorer 11 Remote Code Execution Vulnerability"
    },
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "secure@microsoft.com",
        "ID": "CVE-2021-27085",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Internet Explorer 11",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "1.0.0",
                          "version_value": "publication"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Microsoft"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "Internet Explorer Remote Code Execution Vulnerability"
          }
        ]
      },
      "impact": {
        "cvss": [
          {
            "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"
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "Remote Code Execution"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085",
            "refsource": "MISC",
            "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "cisaActionDue": "2021-11-17",
        "cisaExploitAdd": "2021-11-03",
        "cisaRequiredAction": "Apply updates per vendor instructions.",
        "cisaVulnerabilityName": "Microsoft Internet Explorer Remote Code Execution Vulnerability",
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:microsoft:internet_explorer:11:-:*:*:*:*:*:*",
                    "matchCriteriaId": "D7809F78-8D56-4925-A8F9-4119B973A667",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
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                    "criteria": "cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:*:*",
                    "matchCriteriaId": "9E2C378B-1507-4C81-82F6-9F599616845A",
                    "vulnerable": false
                  },
                  {
                    "criteria": "cpe:2.3:o:microsoft:windows_10:1803:*:*:*:*:*:*:*",
                    "matchCriteriaId": "7CB85C75-4D35-480E-843D-60579EC75FCB",
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                  },
                  {
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                    "matchCriteriaId": "6B8F3DD2-A145-4AF1-8545-CC42892DA3D1",
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                  },
                  {
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                  },
                  {
                    "criteria": "cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:*:*",
                    "matchCriteriaId": "AAE74AF3-C559-4645-A6C0-25C3D647AAC8",
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                  },
                  {
                    "criteria": "cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "DB79EE26-FC32-417D-A49C-A1A63165A968",
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                  }
                ],
                "negate": false,
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        ],
        "descriptions": [
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          },
          {
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            "value": "Una Vulnerabilidad de Ejecuci\u00f3n de C\u00f3digo Remota de Internet Explorer"
          }
        ],
        "id": "CVE-2021-27085",
        "lastModified": "2023-12-29T17:16:07.137",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "HIGH",
              "cvssData": {
                "accessComplexity": "HIGH",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "COMPLETE",
                "baseScore": 7.6,
                "confidentialityImpact": "COMPLETE",
                "integrityImpact": "COMPLETE",
                "vectorString": "AV:N/AC:H/Au:N/C:C/I:C/A:C",
                "version": "2.0"
              },
              "exploitabilityScore": 4.9,
              "impactScore": 10.0,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
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              "source": "nvd@nist.gov",
              "type": "Primary",
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            }
          ],
          "cvssMetricV31": [
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                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "LOW",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "CHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:L",
                "version": "3.1"
              },
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              "impactScore": 5.3,
              "source": "secure@microsoft.com",
              "type": "Primary"
            },
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.6,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Secondary"
            }
          ]
        },
        "published": "2021-03-11T16:15:18.677",
        "references": [
          {
            "source": "secure@microsoft.com",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-27085"
          }
        ],
        "sourceIdentifier": "secure@microsoft.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    }
  }
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2021-27085 (GCVE-0-2021-27085)

CISA

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Vendor Report Successful Exploitation Confidence: 80% Source: cisa-kev

Details

References

Previdian

Known Exploited Vulnerability - GCVE BCP-07 Compliant

Timestamps

Scope

Evidence

Public Report Successful Exploitation Confidence: 70% Source: kevintel

Details

References

CERTFR-2021-AVI-178

Solution

CERTFR-2021-AVI-178

Solution

BDU:2021-01365 (CVE-2021-27085)

FKIE_CVE-2021-27085

GHSA-VM76-5X29-7JX8

GSD-2021-27085

Tags

Sightings

Nomenclature

Related by attack behaviour