{
  "cveId": "CVE-2021-26895",
  "url": "https://patchblox.com/security/cve/CVE-2021-26895",
  "summary": "CVE-2021-26895 is fixed in 17 products on 1 platform, first by KB5000803, released March 9, 2021. It is not reported as exploited. Patch Radar priority: High.",
  "title": "Windows DNS Server Remote Code Execution Vulnerability",
  "description": "",
  "published": "2021-03-09T14:00:00Z",
  "severity": "Important",
  "cvss": 9.8,
  "epss": 0.07755,
  "epssPercentile": 0.94674,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Less Likely",
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26895",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 R2 for x64-based Systems Service Pack 1",
      "fixedVersion": "",
      "fix": "KB5000841",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000841",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 R2 for x64-based Systems Service Pack 1",
      "fixedVersion": "",
      "fix": "KB5000851",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000851",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5000841",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000841",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5000851",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000851",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for 32-bit Systems Service Pack 2",
      "fixedVersion": "",
      "fix": "KB5000856",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000856",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for 32-bit Systems Service Pack 2",
      "fixedVersion": "",
      "fix": "KB5000844",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000844",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5000856",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000856",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5000844",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000844",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for x64-based Systems Service Pack 2",
      "fixedVersion": "",
      "fix": "KB5000856",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000856",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for x64-based Systems Service Pack 2",
      "fixedVersion": "",
      "fix": "KB5000844",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000844",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5000856",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000856",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5000844",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000844",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012",
      "fixedVersion": "",
      "fix": "KB5000840",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000840",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012",
      "fixedVersion": "",
      "fix": "KB5000847",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000847",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5000840",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000840",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5000847",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000847",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2",
      "fixedVersion": "",
      "fix": "KB5000853",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000853",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2",
      "fixedVersion": "",
      "fix": "KB5000848",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000848",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5000853",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000853",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5000848",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000848",
      "released": "2021-03-09T14:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016",
      "fixedVersion": "14393.4283",
      "fix": "KB5000803",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000803",
      "released": "2021-03-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016 (Server Core installation)",
      "fixedVersion": "14393.4283",
      "fix": "KB5000803",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000803",
      "released": "2021-03-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019",
      "fixedVersion": "17763.1817",
      "fix": "KB5000822",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000822",
      "released": "2021-03-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019 (Server Core installation)",
      "fixedVersion": "17763.1817",
      "fix": "KB5000822",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000822",
      "released": "2021-03-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 1909 (Server Core installation)",
      "fixedVersion": "18363.1440",
      "fix": "KB5000808",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000808",
      "released": "2021-03-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 2004 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5000802",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000802",
      "released": "2021-03-09T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server, version 20H2 (Server Core Installation)",
      "fixedVersion": "",
      "fix": "KB5000802",
      "url": "https://patchblox.com/security/fix/microsoft/kb5000802",
      "released": "2021-03-09T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}