« Volver al listado

CVE-2026-20838

Estado: AnalizadaMedia (5.5)—

Generation of error message containing sensitive information in Windows Kernel allows an authorized attacker to disclose information 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 (6)

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-20838",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-20838",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-01-13T19:36:35.671393Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "secure@microsoft.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "secure@microsoft.com",
      "affectedData": [
        {
          "vendor": "Microsoft",
          "product": "Windows 11 version 23H2",
          "versions": [
            {
              "status": "affected",
              "version": "10.0.22631.0",
              "lessThan": "10.0.22631.6491",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "ARM64-based Systems"
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows 11 Version 23H2",
          "versions": [
            {
              "status": "affected",
              "version": "10.0.22631.0",
              "lessThan": "10.0.22631.6491",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "x64-based Systems"
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows 11 Version 24H2",
          "versions": [
            {
              "status": "affected",
              "version": "10.0.26100.0",
              "lessThan": "10.0.26100.7623",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows 11 Version 25H2",
          "versions": [
            {
              "status": "affected",
              "version": "10.0.26200.0",
              "lessThan": "10.0.26200.7623",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "ARM64-based Systems",
            "x64-based Systems"
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2022",
          "versions": [
            {
              "status": "affected",
              "version": "10.0.20348.0",
              "lessThan": "10.0.20348.4648",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "x64-based Systems"
          ]
        },
        {
          "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",
              "version": "10.0.26100.0",
              "lessThan": "10.0.26100.32230",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "x64-based Systems"
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2025 (Server Core installation)",
          "versions": [
            {
              "status": "affected",
              "version": "10.0.26100.0",
              "lessThan": "10.0.26100.32230",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "x64-based Systems"
          ]
        }
      ]
    }
  ],
  "published": "2026-01-13T18:16:12.153",
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20838",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secure@microsoft.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "secure@microsoft.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-209"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Generation of error message containing sensitive information in Windows Kernel allows an authorized attacker to disclose information locally."
    },
    {
      "lang": "es",
      "value": "Generación de mensaje de error que contiene información sensible en el kernel de Windows permite a un atacante autorizado divulgar información localmente."
    }
  ],
  "lastModified": "2026-07-30T21:17:01.730",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8D675DAA-4DCE-4727-BE5F-C954BBD252C4",
              "versionEndExcluding": "10.0.22631.6491"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D249551B-1433-4E5E-A587-40F782E91E09",
              "versionEndExcluding": "10.0.26100.7623"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "22082D4E-E68F-4E48-98FB-42DFDEE2E2A8",
              "versionEndExcluding": "10.0.26200.7623"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C4AA6991-DE34-48F6-AFD3-77CEE7FBB692",
              "versionEndExcluding": "10.0.20348.4648"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BA5947E0-C44C-4517-A307-DA79752F30A8",
              "versionEndExcluding": "10.0.25398.2092"
            },
            {
              "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D44880ED-E8E9-49A8-BD56-503C63D40000",
              "versionEndExcluding": "10.0.26100.32230"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secure@microsoft.com"
}