High

Microsoft Brokering File System Elevation of Privilege Vulnerability

Type: advisorySource: Official CVE List1 source record

Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Brokering File System allows an unauthorized attacker to elevate privileges locally.

Announced 14 Apr 2026Group revision 1

Original source ↗

CVE-2026-32091

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-32091

Windows 10 Version 1607

Source reference: /containers/cna/affected/0/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows 10 Version 1809

Source reference: /containers/cna/affected/1/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows 10 Version 21H2

Source reference: /containers/cna/affected/2/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows 10 Version 22H2

Source reference: /containers/cna/affected/3/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows 11 version 23H2

Source reference: /containers/cna/affected/4/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows 11 Version 23H2

Source reference: /containers/cna/affected/5/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows 11 Version 24H2

Source reference: /containers/cna/affected/6/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows 11 Version 25H2

Source reference: /containers/cna/affected/7/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows 11 version 26H1

Source reference: /containers/cna/affected/8/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows Server 2016

Source reference: /containers/cna/affected/9/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows Server 2016 (Server Core installation)

Source reference: /containers/cna/affected/10/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows Server 2019

Source reference: /containers/cna/affected/11/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows Server 2019 (Server Core installation)

Source reference: /containers/cna/affected/12/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows Server 2022

Source reference: /containers/cna/affected/13/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows Server 2022, 23H2 Edition (Server Core installation)

Source reference: /containers/cna/affected/14/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows Server 2025

Source reference: /containers/cna/affected/15/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Windows Server 2025 (Server Core installation)

Source reference: /containers/cna/affected/16/product

Affected versions: Not stated in this record
Fixed versions: Not stated in this record
Prerequisites: Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "Microsoft",
    "product": "Windows 10 Version 1607",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.14393.0",
        "lessThan": "10.0.14393.9060",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "32-bit Systems",
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 10 Version 1809",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.17763.0",
        "lessThan": "10.0.17763.8644",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "32-bit Systems",
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 10 Version 21H2",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.19044.0",
        "lessThan": "10.0.19044.7184",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "32-bit Systems",
      "ARM64-based Systems",
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 10 Version 22H2",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.19045.0",
        "lessThan": "10.0.19045.7184",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "32-bit Systems",
      "ARM64-based Systems",
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 11 version 23H2",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.22631.0",
        "lessThan": "10.0.22631.6936",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "ARM64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 11 Version 23H2",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.22631.0",
        "lessThan": "10.0.22631.6936",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 11 Version 24H2",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.26100.0",
        "lessThan": "10.0.26100.8246",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "ARM64-based Systems",
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 11 Version 25H2",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.26200.0",
        "lessThan": "10.0.26200.8246",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "ARM64-based Systems",
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 11 version 26H1",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.28000.0",
        "lessThan": "10.0.28000.1836",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "ARM64-based Systems",
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2016",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.14393.0",
        "lessThan": "10.0.14393.9060",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2016 (Server Core installation)",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.14393.0",
        "lessThan": "10.0.14393.9060",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2019",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.17763.0",
        "lessThan": "10.0.17763.8644",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2019 (Server Core installation)",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.17763.0",
        "lessThan": "10.0.17763.8644",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2022",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.20348.0",
        "lessThan": "10.0.20348.5020",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2022, 23H2 Edition (Server Core installation)",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.25398.0",
        "lessThan": "10.0.25398.2274",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2025",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.26100.0",
        "lessThan": "10.0.26100.32690",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2025 (Server Core installation)",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.26100.0",
        "lessThan": "10.0.26100.32690",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  }
]

Related CVEs: CVE-2026-32091
Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event: #29207 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 07:55:31 GMT
Publisher date: Tue, 14 Apr 2026 16:58:24 GMT

Read the original announcement

Revision history

25 Oct 2026CVE-2026-32091 · Revision 1Source updated