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CVE-2019-0959

Status: ModifiedHigh (7)—💥 Exploit

An elevation of privilege vulnerability exists when the Windows Common Log File System (CLFS) driver improperly handles objects in memory. An attacker who successfully exploited this vulnerability could run processes in an elevated context. To exploit the vulnerability, an attacker would first have to log on to the system, and then run a specially crafted application to take control over the affected system. The security update addresses the vulnerability by correcting how CLFS handles objects in memory.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

💥 Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Affected technologies (3)

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2019-0959",
  "cveTags": [],
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        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 7.2,
          "accessVector": "LOCAL",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
          "authentication": "NONE",
          "integrityImpact": "COMPLETE",
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          "confidentialityImpact": "COMPLETE"
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        "acInsufInfo": false,
        "impactScore": 10,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 3.9,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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    "cvssMetricV31": [
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        "type": "Secondary",
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          "product": "Windows 10 Version 1803",
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              "version": "10.0.0",
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          "platforms": [
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          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows 10 Version 1809",
          "versions": [
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              "version": "10.0.17763.0",
              "lessThan": "publication",
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          "platforms": [
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          "vendor": "Microsoft",
          "product": "Windows Server 2019",
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              "version": "10.0.17763.0",
              "lessThan": "publication",
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          "product": "Windows Server 2019 (Server Core installation)",
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              "version": "10.0.17763.0",
              "lessThan": "publication",
              "versionType": "custom"
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          ],
          "platforms": [
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        {
          "vendor": "Microsoft",
          "product": "Windows 10 Version 1903 for 32-bit Systems",
          "versions": [
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          "vendor": "Microsoft",
          "product": "Windows 10 Version 1903 for ARM64-based Systems",
          "versions": [
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              "status": "affected",
              "version": "10.0.0",
              "lessThan": "publication",
              "versionType": "custom"
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        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server, version 1903 (Server Core installation)",
          "versions": [
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              "status": "affected",
              "version": "10.0.0",
              "lessThan": "publication",
              "versionType": "custom"
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          "platforms": [
            "x64-based Systems"
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  ],
  "published": "2019-06-12T14:29:01.773",
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-0959",
      "source": "secure@microsoft.com"
    },
    {
      "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0959",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An elevation of privilege vulnerability exists when the Windows Common Log File System (CLFS) driver improperly handles objects in memory. An attacker who successfully exploited this vulnerability could run processes in an elevated context.\nTo exploit the vulnerability, an attacker would first have to log on to the system, and then run a specially crafted application to take control over the affected system.\nThe security update addresses the vulnerability by correcting how CLFS handles objects in memory."
    },
    {
      "lang": "es",
      "value": "Existe una vulnerabilidad de elevación de privilegios cuando el controlador de Common Log File System (CLFS) de Windows maneja inapropiadamente los objetos en la memoria, también se conoce como 'Windows Common Log File System Driver Elevation of Privilege Vulnerability'. Este ID de CVE es diferente de CVE-2019-0984."
    }
  ],
  "lastModified": "2026-06-17T02:09:17.633",
  "configurations": [
    {
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  "sourceIdentifier": "secure@microsoft.com"
}