{
  "cveId": "CVE-2026-21533",
  "url": "https://patchblox.com/security/cve/CVE-2026-21533",
  "summary": "CVE-2026-21533 is fixed in 31 products on 1 platform, first by KB5075999, released February 10, 2026. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on February 10, 2026. Patch Radar priority: Patch now.",
  "title": "Windows Remote Desktop Services Elevation of Privilege Vulnerability",
  "description": "\u003Cp\u003EImproper privilege management in Windows Remote Desktop allows an authorized attacker to elevate privileges locally.\u003C/p\u003E",
  "published": "2026-02-10T08:00:00Z",
  "severity": "Important",
  "cvss": 7.8,
  "cwe": "Improper Privilege Management",
  "epss": 0.04335,
  "epssPercentile": 0.91261,
  "priority": "Patch now",
  "priorityTier": 1,
  "exploited": true,
  "vendorExploited": true,
  "disclosed": false,
  "exploitabilityAssessment": "Exploitation Detected",
  "kev": {
    "added": "2026-02-10T00:00:00Z",
    "due": "2026-03-03T00:00:00Z",
    "ransomware": false,
    "requiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable."
  },
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21533",
  "fixes": [
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for 32-bit Systems",
      "fixedVersion": "14393.8868",
      "fix": "KB5075999",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075999",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1607 for x64-based Systems",
      "fixedVersion": "14393.8868",
      "fix": "KB5075999",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075999",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for 32-bit Systems",
      "fixedVersion": "17763.8389",
      "fix": "KB5075904",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075904",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 1809 for x64-based Systems",
      "fixedVersion": "17763.8389",
      "fix": "KB5075904",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075904",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H2 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5075912",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075912",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5075912",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075912",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 21H2 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5075912",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075912",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 22H2 for 32-bit Systems",
      "fixedVersion": "",
      "fix": "KB5075912",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075912",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 22H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5075912",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075912",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 10 Version 22H2 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5075912",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075912",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 23H2 for ARM64-based Systems",
      "fixedVersion": "22631.6649",
      "fix": "KB5075941",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075941",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 23H2 for x64-based Systems",
      "fixedVersion": "22631.6649",
      "fix": "KB5075941",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075941",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 24H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5077212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5077212",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 24H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5077181",
      "url": "https://patchblox.com/security/fix/microsoft/kb5077181",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 24H2 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5077212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5077212",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 24H2 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5077181",
      "url": "https://patchblox.com/security/fix/microsoft/kb5077181",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 25H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5077212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5077212",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 25H2 for ARM64-based Systems",
      "fixedVersion": "",
      "fix": "KB5077181",
      "url": "https://patchblox.com/security/fix/microsoft/kb5077181",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 25H2 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5077212",
      "url": "https://patchblox.com/security/fix/microsoft/kb5077212",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 25H2 for x64-based Systems",
      "fixedVersion": "",
      "fix": "KB5077181",
      "url": "https://patchblox.com/security/fix/microsoft/kb5077181",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 Version 26H1 for ARM64-based Systems",
      "fixedVersion": "28000.1575",
      "fix": "KB5077179",
      "url": "https://patchblox.com/security/fix/microsoft/kb5077179",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows 11 version 26H1 for x64-based Systems",
      "fixedVersion": "28000.1575",
      "fix": "KB5077179",
      "url": "https://patchblox.com/security/fix/microsoft/kb5077179",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012",
      "fixedVersion": "",
      "fix": "KB5075971",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075971",
      "released": "2026-02-10T08:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5075971",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075971",
      "released": "2026-02-10T08:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2",
      "fixedVersion": "",
      "fix": "KB5075970",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075970",
      "released": "2026-02-10T08:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2012 R2 (Server Core installation)",
      "fixedVersion": "",
      "fix": "KB5075970",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075970",
      "released": "2026-02-10T08:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016",
      "fixedVersion": "14393.8868",
      "fix": "KB5075999",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075999",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2016 (Server Core installation)",
      "fixedVersion": "14393.8868",
      "fix": "KB5075999",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075999",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019",
      "fixedVersion": "17763.8389",
      "fix": "KB5075904",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075904",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2019 (Server Core installation)",
      "fixedVersion": "17763.8389",
      "fix": "KB5075904",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075904",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022",
      "fixedVersion": "20348.4773",
      "fix": "KB5075906",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075906",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022",
      "fixedVersion": "20348.4711",
      "fix": "KB5075943",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075943",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022 (Server Core installation)",
      "fixedVersion": "20348.4773",
      "fix": "KB5075906",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075906",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022 (Server Core installation)",
      "fixedVersion": "20348.4711",
      "fix": "KB5075943",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075943",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
      "fixedVersion": "25398.2149",
      "fix": "KB5075897",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075897",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2025",
      "fixedVersion": "26100.32313",
      "fix": "KB5075942",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075942",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2025",
      "fixedVersion": "26100.32370",
      "fix": "KB5075899",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075899",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2025 (Server Core installation)",
      "fixedVersion": "26100.32313",
      "fix": "KB5075942",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075942",
      "released": "2026-02-10T00:00:00Z"
    },
    {
      "platform": "microsoft",
      "product": "Windows Server 2025 (Server Core installation)",
      "fixedVersion": "26100.32370",
      "fix": "KB5075899",
      "url": "https://patchblox.com/security/fix/microsoft/kb5075899",
      "released": "2026-02-10T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}