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CVE-2026-70066

Full vulnerability record from the local CVENow database.

Description

Use after free in Windows DHCP Server allows an authorized attacker to elevate privileges locally.

Severity
HIGH
CVSS score
7.0 (v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-10-13 19:19:17.800000
Last modified
2026-10-28 16:30:15.157000
View original CVE JSON
{
  "id": "CVE-2026-70066",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-13T19:19:17.800",
  "lastModified": "2026-10-28T16:30:15.157",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Use after free in Windows DHCP Server allows an authorized attacker to elevate privileges locally."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Microsoft",
          "product": "Windows 10 Version 1607",
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            "x64-based Systems"
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        {
          "vendor": "Microsoft",
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              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2012",
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "6.2.9200.0",
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        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2012 (Server Core installation)",
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          "vendor": "Microsoft",
          "product": "Windows Server 2012 R2",
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        {
          "vendor": "Microsoft",
          "product": "Windows Server 2019",
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          "vendor": "Microsoft",
          "product": "Windows Server 2022",
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          ],
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              "version": "10.0.20348.0",
              "lessThan": "10.0.20348.5761",
              "versionType": "custom",
              "status": "affected"
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          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2025",
          "platforms": [
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          ],
          "versions": [
            {
              "version": "10.0.26100.0",
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      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.0,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-13T20:59:39.575540Z",
          "id": "CVE-2026-70066",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
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  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70066",
      "source": "[email protected]",
      "tags": [
        "Vendor Advisory",
        "Patch"
      ]
    }
  ]
}