CVE-2021-1647

Estado: AnalizadaAlta (7.8)⚠ Explotación activa
Microsoft Defender Remote Code Execution Vulnerability
CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Puntuación base: 7.8
Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 39%
Percentil entre todas las CVEs puntuadas: 99
Fecha de la puntuación: 3/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
CISA KEV — explotada activamente

Añadida al catálogo: 3/11/2021
Plazo de remediación: 17/11/2021
Uso conocido en ransomware: Unknown
🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
ExplotaciónT1068 Exploitation for Privilege Escalationprivilege escalation60 %
Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Threat Intelligence Program Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software
Tecnologías afectadas (3)

Microsoft — Security Essentials Microsoft — System Center Endpoint Protection Microsoft — Windows Defender
CWE

NVD-CWE-noinfo
Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2021-1647",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-1647",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-01-24T15:56:07.173473Z"
        }
      }
    ],
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.2,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "LOW",
          "availabilityImpact": "COMPLETE",
          "confidentialityImpact": "COMPLETE"
        },
        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "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": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "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:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:microsoft:system_center_endpoint_protection:-:*:*:*:*:*:*:*"
          ],
          "vendor": "Microsoft",
          "product": "Microsoft System Center Endpoint Protection",
          "versions": [
            {
              "status": "affected",
              "version": "N/A"
            }
          ],
          "platforms": [
            "Unknown"
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:system_center_endpoint_protection:2012:r2:*:*:*:*:*:*"
          ],
          "vendor": "Microsoft",
          "product": "Microsoft System Center 2012 R2 Endpoint Protection",
          "versions": [
            {
              "status": "affected",
              "version": "N/A"
            }
          ],
          "platforms": [
            "Unknown"
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:security_essentials:-:*:*:*:*:*:*:*"
          ],
          "vendor": "Microsoft",
          "product": "Microsoft Security Essentials",
          "versions": [
            {
              "status": "affected",
              "version": "N/A"
            }
          ],
          "platforms": [
            "Unknown"
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:system_center_endpoint_protection:2012:-:*:*:*:*:*:*"
          ],
          "vendor": "Microsoft",
          "product": "Microsoft System Center 2012 Endpoint Protection",
          "versions": [
            {
              "status": "affected",
              "version": "N/A"
            }
          ],
          "platforms": [
            "Unknown"
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:microsoft:windows_defender:-:*:*:*:*:*:*:*"
          ],
          "vendor": "Microsoft",
          "product": "Windows Defender",
          "versions": [
            {
              "status": "affected",
              "version": "N/A"
            }
          ],
          "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 Server 2019 (Server Core installation)",
            "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 Server, version 1909 (Server Core installation)",
            "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 Server, version 2004 (Server Core installation)",
            "Windows 10 Version 20H2 for 32-bit Systems",
            "Windows 10 Version 20H2 for ARM64-based Systems",
            "Windows Server, version 20H2 (Server Core Installation)",
            "Windows 10 for 32-bit Systems",
            "Windows 10 for x64-based Systems",
            "Windows 10 Version 1607 for 32-bit Systems",
            "Windows 10 Version 1607 for x64-based Systems",
            "Windows Server 2016",
            "Windows Server 2016 (Server Core installation)",
            "Windows 7 for 32-bit Systems Service Pack 1",
            "Windows 7 for x64-based Systems Service Pack 1",
            "Windows 8.1 for 32-bit systems",
            "Windows 8.1 for x64-based systems",
            "Windows RT 8.1",
            "Windows Server 2008 for 32-bit Systems Service Pack 2",
            "Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)",
            "Windows Server 2008 R2 for x64-based Systems Service Pack 1",
            "Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)",
            "Windows Server 2012",
            "Windows Server 2012 (Server Core installation)",
            "Windows Server 2012 R2",
            "Windows Server 2012 R2 (Server Core installation)"
          ]
        }
      ]
    }
  ],
  "published": "2021-01-12T20:15:30.727",
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1647",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1647",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-1647",
      "tags": [
        "US Government Resource"
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Microsoft Defender Remote Code Execution Vulnerability"
    },
    {
      "lang": "es",
      "value": "Una Vulnerabilidad de Ejecución de Código Remota de Microsoft Defender"
    }
  ],
  "lastModified": "2026-06-17T03:32:13.953",
  "cisaActionDue": "2021-11-17",
  "cisaExploitAdd": "2021-11-03",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:windows_defender:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "794244D1-F317-44C8-8338-3DA74E71D4B0"
            }
          ],
          "operator": "OR"
        },
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "542DAEEC-73CC-46C6-A630-BF474A3446AC"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "61019899-D7AF-46E4-A72C-D189180F66AB"
            },
            {
              "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_7:-:sp1:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "C2B1C231-DE19-4B8F-A4AA-5B3A65276E46"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "E93068DB-549B-45AB-8E5C-00EB5D8B5CF8"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "C6CE5198-C498-4672-AF4C-77AB4BE06C5C"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_1909:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "ADE7E7B1-64AC-4986-A50B-0918A42C05BB"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2004:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "62224791-644C-4D1F-AD77-56B16CF27630"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "5F422A8C-2C4E-42C8-B420-E0728037E15C"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*",
              "vulnerable": false,
              "matchCriteriaId": "AF07A81D-12E5-4B1D-BFF9-C8D08C32FF4F"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "A7DF96F8-BA6A-4780-9CA3-F719B3F81074"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "DB18C4CE-5917-401E-ACF7-2747084FD36E"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "041FF8BA-0B12-4A1F-B4BF-9C4F33B7C1E7"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "DB79EE26-FC32-417D-A49C-A1A63165A968"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_20h2:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "84F9B6B1-4FEE-4D4B-B35F-B07822CCD669"
            }
          ],
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:microsoft:security_essentials:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "20FBA682-B703-4590-98E4-8897EED11DE0"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:system_center_endpoint_protection:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "194DE421-9536-4001-9A27-6C88805421EA"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:system_center_endpoint_protection:2012:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "410C8132-8953-4A2E-AF04-BBB4044BA64C"
            },
            {
              "criteria": "cpe:2.3:a:microsoft:system_center_endpoint_protection:2012:r2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D2D1AAB8-A55D-404A-A431-7F4A0201F488"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "Microsoft Defender Remote Code Execution Vulnerability"
}