Medium

Windows Secure Socket Tunneling Protocol (SSTP) Denial of Service Vulnerability

Type: advisorySource: Official CVE List1 source record

Missing release of resource after effective lifetime in Windows Secure Socket Tunneling Protocol (SSTP) allows an authorized attacker to deny service locally.

Announced 8 Sept 2026Group revision 1

Original source ↗

CVE-2026-72931

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-2026-72931

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 2012

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 2012 (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 2012 R2

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 2012 R2 (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 2016

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 2016 (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 2019

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 2019 (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

Windows Server 2022

Source reference: /containers/cna/affected/17/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/18/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/19/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": "10.0.14393.9512",
        "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": "10.0.17763.9245",
        "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": "10.0.19044.7725",
        "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": "10.0.19045.7725",
        "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": "10.0.22631.7582",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "ARM64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 11 Version 23H2",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.22631.0",
        "lessThan": "10.0.22631.7582",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 11 Version 24H2",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.26100.0",
        "lessThan": "10.0.26100.9445",
        "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": "10.0.26200.9445",
        "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": "10.0.28000.2954",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "ARM64-based Systems",
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2012",
    "versions": [
      {
        "status": "affected",
        "version": "6.2.9200.0",
        "lessThan": "6.2.9200.26349",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2012 (Server Core installation)",
    "versions": [
      {
        "status": "affected",
        "version": "6.2.9200.0",
        "lessThan": "6.2.9200.26349",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2012 R2",
    "versions": [
      {
        "status": "affected",
        "version": "6.3.9600.0",
        "lessThan": "6.3.9600.23398",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2012 R2 (Server Core installation)",
    "versions": [
      {
        "status": "affected",
        "version": "6.3.9600.0",
        "lessThan": "6.3.9600.23398",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2016",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.14393.0",
        "lessThan": "10.0.14393.9512",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2016 (Server Core installation)",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.14393.0",
        "lessThan": "10.0.14393.9512",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2019",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.17763.0",
        "lessThan": "10.0.17763.9245",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2019 (Server Core installation)",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.17763.0",
        "lessThan": "10.0.17763.9245",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2022",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.20348.0",
        "lessThan": "10.0.20348.5622",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2025",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.26100.0",
        "lessThan": "10.0.26100.33438",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2025 (Server Core installation)",
    "versions": [
      {
        "status": "affected",
        "version": "10.0.26100.0",
        "lessThan": "10.0.26100.33438",
        "versionType": "custom"
      }
    ],
    "platforms": [
      "x64-based Systems"
    ]
  }
]

Related CVEs: CVE-2026-72931
Source reference: /cveMetadata/cveId

Publisher severity

medium

Source reference: /containers/cna/metrics

Event: #25477 · Revision 1
Added to Heist Feed: Sun, 25 Oct 2026 06:52:57 GMT
Publisher date: Tue, 08 Sep 2026 17:17:03 GMT

Read the original announcement

Revision history

25 Oct 2026CVE-2026-72931 · Revision 1Source updated