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CVE-2026-20876

Estado: AnalizadaMedia (6.7)—

Heap-based buffer overflow in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally.

CVSS

Probabilidad de explotación (EPSS)

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).

Tecnologías afectadas (5)

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-20876",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
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        "ssvcData": {
          "id": "CVE-2026-20876",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-01-14T04:55:52.438928Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "type": "Secondary",
        "source": "secure@microsoft.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.7,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 0.8
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "Microsoft",
          "product": "Windows 11 version 23H2",
          "versions": [
            {
              "status": "affected",
              "version": "10.0.22631.0",
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          ],
          "platforms": [
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          "product": "Windows 11 Version 24H2",
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          "platforms": [
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        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
          "versions": [
            {
              "status": "affected",
              "version": "10.0.25398.0",
              "lessThan": "10.0.25398.2092",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "x64-based Systems"
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2025",
          "versions": [
            {
              "status": "affected",
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              "lessThan": "10.0.26100.32230",
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          ],
          "platforms": [
            "x64-based Systems"
          ]
        },
        {
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          "product": "Windows Server 2025 (Server Core installation)",
          "versions": [
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              "status": "affected",
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              "lessThan": "10.0.26100.32230",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "x64-based Systems"
          ]
        }
      ]
    }
  ],
  "published": "2026-01-13T18:16:17.650",
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20876",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secure@microsoft.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Heap-based buffer overflow in Windows Virtualization-Based Security (VBS) Enclave allows an authorized attacker to elevate privileges locally."
    },
    {
      "lang": "es",
      "value": "Desbordamiento de búfer basado en montículo en el Enclave de Seguridad Basada en Virtualización (VBS) de Windows permite a un atacante autorizado elevar privilegios localmente."
    }
  ],
  "lastModified": "2026-07-30T21:17:07.523",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
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              "versionEndExcluding": "10.0.22631.6491"
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              "versionEndExcluding": "10.0.25398.2092"
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          "operator": "OR"
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  ],
  "sourceIdentifier": "secure@microsoft.com"
}