{
  "fix": "KB5035854",
  "url": "https://patchblox.com/security/fix/microsoft/kb5035854",
  "summary": "KB5035854, released March 12, 2024, fixes 35 CVEs across 2 products. One of them is being exploited (CVE-2024-26169); 1 on CISA KEV. Patch Radar priority: Patch now. The product is no longer supported.",
  "platform": "microsoft",
  "type": "kb",
  "releaseKind": "Security",
  "title": "March 2024 cumulative update for Windows 11 21H2",
  "released": "2024-03-12T00:00:00Z",
  "priority": "Patch now",
  "priorityTier": 1,
  "priorityReason": "Closes CVE-2024-26169, exploited (CISA KEV, ransomware)",
  "supported": false,
  "cveCount": 35,
  "exploitedCveCount": 1,
  "kevCveCount": 1,
  "ransomwareCveCount": 1,
  "maxEpss": 0.16256,
  "maxCvss": 8.8,
  "vendorAdvisory": "https://support.microsoft.com/help/5035854",
  "appliesTo": [
    {
      "product": "Windows 11 version 21H2 for ARM64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-11-version-21h2-for-arm64-based-systems",
      "fixedVersion": "22000.2836",
      "supported": false
    },
    {
      "product": "Windows 11 version 21H2 for x64-based Systems",
      "productUrl": "https://patchblox.com/security/product/microsoft/windows-11-version-21h2-for-x64-based-systems",
      "fixedVersion": "22000.2836",
      "supported": false
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2024-26169",
      "url": "https://patchblox.com/security/cve/CVE-2024-26169",
      "title": "Windows Error Reporting Service Elevation of Privilege Vulnerability",
      "component": "Windows Error Reporting",
      "impact": "Elevation of Privilege",
      "priority": "Patch now",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.04014,
      "kev": true,
      "ransomware": true,
      "exploited": true,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21407",
      "url": "https://patchblox.com/security/cve/CVE-2024-21407",
      "title": "Windows Hyper-V Remote Code Execution Vulnerability",
      "component": "Role: Windows Hyper-V",
      "impact": "Remote Code Execution",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 8.1,
      "epss": 0.16256,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21437",
      "url": "https://patchblox.com/security/cve/CVE-2024-21437",
      "title": "Windows Graphics Component Elevation of Privilege Vulnerability",
      "component": "Microsoft Graphics Component",
      "impact": "Elevation of Privilege",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.08031,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-26170",
      "url": "https://patchblox.com/security/cve/CVE-2024-26170",
      "title": "Windows Composite Image File System (CimFS) Elevation of Privilege Vulnerability",
      "component": "Windows Composite Image File System",
      "impact": "Elevation of Privilege",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.06647,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21433",
      "url": "https://patchblox.com/security/cve/CVE-2024-21433",
      "title": "Windows Print Spooler Elevation of Privilege Vulnerability",
      "component": "Windows Print Spooler Components",
      "impact": "Elevation of Privilege",
      "priority": "Urgent",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.05138,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21408",
      "url": "https://patchblox.com/security/cve/CVE-2024-21408",
      "title": "Windows Hyper-V Denial of Service Vulnerability",
      "component": "Role: Windows Hyper-V",
      "impact": "Denial of Service",
      "priority": "Urgent",
      "severity": "Critical",
      "cvss": 5.5,
      "epss": 0.04507,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-26190",
      "url": "https://patchblox.com/security/cve/CVE-2024-26190",
      "title": "Microsoft QUIC Denial of Service Vulnerability",
      "component": "Microsoft QUIC",
      "impact": "Denial of Service",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.0299,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21438",
      "url": "https://patchblox.com/security/cve/CVE-2024-21438",
      "title": "Microsoft AllJoyn API Denial of Service Vulnerability",
      "component": "Windows AllJoyn API",
      "impact": "Denial of Service",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.5,
      "epss": 0.02718,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21440",
      "url": "https://patchblox.com/security/cve/CVE-2024-21440",
      "title": "Microsoft ODBC Driver Remote Code Execution Vulnerability",
      "component": "Windows ODBC Driver",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.02026,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21450",
      "url": "https://patchblox.com/security/cve/CVE-2024-21450",
      "title": "Microsoft WDAC OLE DB provider for SQL Server Remote Code Execution Vulnerability",
      "component": "Microsoft WDAC OLE DB provider for SQL",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.02026,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-26166",
      "url": "https://patchblox.com/security/cve/CVE-2024-26166",
      "title": "Microsoft WDAC OLE DB provider for SQL Server Remote Code Execution Vulnerability",
      "component": "Microsoft WDAC OLE DB provider for SQL",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.02026,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-26162",
      "url": "https://patchblox.com/security/cve/CVE-2024-26162",
      "title": "Microsoft ODBC Driver Remote Code Execution Vulnerability",
      "component": "Windows ODBC Driver",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.02024,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21441",
      "url": "https://patchblox.com/security/cve/CVE-2024-21441",
      "title": "Microsoft WDAC OLE DB provider for SQL Server Remote Code Execution Vulnerability",
      "component": "Microsoft WDAC OLE DB provider for SQL",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.01947,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21444",
      "url": "https://patchblox.com/security/cve/CVE-2024-21444",
      "title": "Microsoft WDAC OLE DB provider for SQL Server Remote Code Execution Vulnerability",
      "component": "Microsoft WDAC OLE DB provider for SQL",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.01947,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21451",
      "url": "https://patchblox.com/security/cve/CVE-2024-21451",
      "title": "Microsoft ODBC Driver Remote Code Execution Vulnerability",
      "component": "Microsoft WDAC ODBC Driver",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.01947,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-26159",
      "url": "https://patchblox.com/security/cve/CVE-2024-26159",
      "title": "Microsoft ODBC Driver Remote Code Execution Vulnerability",
      "component": "Windows ODBC Driver",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.01947,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-26161",
      "url": "https://patchblox.com/security/cve/CVE-2024-26161",
      "title": "Microsoft WDAC OLE DB provider for SQL Server Remote Code Execution Vulnerability",
      "component": "Microsoft WDAC OLE DB provider for SQL",
      "impact": "Remote Code Execution",
      "priority": "High",
      "severity": "Important",
      "cvss": 8.8,
      "epss": 0.01947,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21443",
      "url": "https://patchblox.com/security/cve/CVE-2024-21443",
      "title": "Windows Kernel Elevation of Privilege Vulnerability",
      "component": "Windows Kernel",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.3,
      "epss": 0.01286,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-26173",
      "url": "https://patchblox.com/security/cve/CVE-2024-26173",
      "title": "Windows Kernel Elevation of Privilege Vulnerability",
      "component": "Windows Kernel",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00894,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-26178",
      "url": "https://patchblox.com/security/cve/CVE-2024-26178",
      "title": "Windows Kernel Elevation of Privilege Vulnerability",
      "component": "Windows Kernel",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00894,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-26176",
      "url": "https://patchblox.com/security/cve/CVE-2024-26176",
      "title": "Windows Kernel Elevation of Privilege Vulnerability",
      "component": "Windows Kernel",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00826,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21434",
      "url": "https://patchblox.com/security/cve/CVE-2024-21434",
      "title": "Microsoft Windows SCSI Class System File Elevation of Privilege Vulnerability",
      "component": "Microsoft Windows SCSI Class System File",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00825,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21442",
      "url": "https://patchblox.com/security/cve/CVE-2024-21442",
      "title": "Windows USB Print Driver Elevation of Privilege Vulnerability",
      "component": "Windows USB Print Driver",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00825,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21436",
      "url": "https://patchblox.com/security/cve/CVE-2024-21436",
      "title": "Windows Installer Elevation of Privilege Vulnerability",
      "component": "Windows Installer",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00721,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21432",
      "url": "https://patchblox.com/security/cve/CVE-2024-21432",
      "title": "Windows Update Stack Elevation of Privilege Vulnerability",
      "component": "Windows Update Stack",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.00689,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21446",
      "url": "https://patchblox.com/security/cve/CVE-2024-21446",
      "title": "NTFS Elevation of Privilege Vulnerability",
      "component": "Windows NTFS",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00663,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21431",
      "url": "https://patchblox.com/security/cve/CVE-2024-21431",
      "title": "Hypervisor-Protected Code Integrity (HVCI) Security Feature Bypass Vulnerability",
      "component": "Windows Hypervisor-Protected Code Integrity",
      "impact": "Security Feature Bypass",
      "priority": "High",
      "severity": "Important",
      "cvss": 7.8,
      "epss": 0.00637,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21445",
      "url": "https://patchblox.com/security/cve/CVE-2024-21445",
      "title": "Windows USB Print Driver Elevation of Privilege Vulnerability",
      "component": "Windows USB Print Driver",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.00541,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21439",
      "url": "https://patchblox.com/security/cve/CVE-2024-21439",
      "title": "Windows Telephony Server Elevation of Privilege Vulnerability",
      "component": "Windows Telephony Server",
      "impact": "Elevation of Privilege",
      "priority": "High",
      "severity": "Important",
      "cvss": 7,
      "epss": 0.0052,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-26177",
      "url": "https://patchblox.com/security/cve/CVE-2024-26177",
      "title": "Windows Kernel Information Disclosure Vulnerability",
      "component": "Windows Kernel",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.0112,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-26181",
      "url": "https://patchblox.com/security/cve/CVE-2024-26181",
      "title": "Windows Kernel Denial of Service Vulnerability",
      "component": "Windows Kernel",
      "impact": "Denial of Service",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.01035,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-26174",
      "url": "https://patchblox.com/security/cve/CVE-2024-26174",
      "title": "Windows Kernel Information Disclosure Vulnerability",
      "component": "Windows Kernel",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.5,
      "epss": 0.0092,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21429",
      "url": "https://patchblox.com/security/cve/CVE-2024-21429",
      "title": "Windows USB Hub Driver Remote Code Execution Vulnerability",
      "component": "Windows USB Hub Driver",
      "impact": "Remote Code Execution",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 6.8,
      "epss": 0.00904,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2024-21430",
      "url": "https://patchblox.com/security/cve/CVE-2024-21430",
      "title": "Windows USB Attached SCSI (UAS) Protocol Remote Code Execution Vulnerability",
      "component": "Windows USB Serial Driver",
      "impact": "Remote Code Execution",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 5.7,
      "epss": 0.00705,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2023-28746",
      "url": "https://patchblox.com/security/cve/CVE-2023-28746",
      "title": "Intel: CVE-2023-28746 Register File Data Sampling (RFDS)",
      "component": "Intel",
      "impact": "Information Disclosure",
      "priority": "Routine",
      "severity": "Important",
      "cvss": 6.5,
      "epss": 0.00546,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}