MSRC_CVE-2026-83971

Vulnerability from csaf_microsoft - Published: 2026-09-08 07:00 - Updated: 2026-09-08 07:00
Summary
Windows Biometric Service Elevation of Privilege Vulnerability
Notes
Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
CWE-122 - Heap-based Buffer Overflow
Affected products
Product Identifier Version Remediation
Windows 10 Version 1809 for 32-bit Systems 10.0.17763.9245
Microsoft / Windows 10 Version 1809 for 32-bit Systems
10.0.17763.9245
Windows 10 Version 1809 for x64-based Systems 10.0.17763.9245
Microsoft / Windows 10 Version 1809 for x64-based Systems
10.0.17763.9245
Windows Server 2019 10.0.17763.9245
Microsoft / Windows Server 2019
10.0.17763.9245
Windows Server 2019 (Server Core installation) 10.0.17763.9245
Microsoft / Windows Server 2019 (Server Core installation)
10.0.17763.9245
Windows Server 2022 10.0.20348.5622
Microsoft / Windows Server 2022
10.0.20348.5622
Windows Server 2022 (Server Core installation) 10.0.20348.5622
Microsoft / Windows Server 2022 (Server Core installation)
10.0.20348.5622
Windows 10 Version 21H2 for 32-bit Systems 10.0.19044.7725
Microsoft / Windows 10 Version 21H2 for 32-bit Systems
10.0.19044.7725
Windows 10 Version 21H2 for ARM64-based Systems 10.0.19044.7725
Microsoft / Windows 10 Version 21H2 for ARM64-based Systems
10.0.19044.7725
Windows 10 Version 21H2 for x64-based Systems 10.0.19044.7725
Microsoft / Windows 10 Version 21H2 for x64-based Systems
10.0.19044.7725
Windows 10 Version 22H2 for x64-based Systems 10.0.19045.7725
Microsoft / Windows 10 Version 22H2 for x64-based Systems
10.0.19045.7725
Windows 10 Version 22H2 for ARM64-based Systems 10.0.19045.7725
Microsoft / Windows 10 Version 22H2 for ARM64-based Systems
10.0.19045.7725
Windows 10 Version 22H2 for 32-bit Systems 10.0.19045.7725
Microsoft / Windows 10 Version 22H2 for 32-bit Systems
10.0.19045.7725
Windows Server 2025 (Server Core installation) 10.0.26100.33438
Microsoft / Windows Server 2025 (Server Core installation)
10.0.26100.33438
Windows 11 Version 25H2 for ARM64-based Systems 10.0.26200.9445
Microsoft / Windows 11 Version 25H2 for ARM64-based Systems
10.0.26200.9445
Windows 11 Version 25H2 for x64-based Systems 10.0.26200.9445
Microsoft / Windows 11 Version 25H2 for x64-based Systems
10.0.26200.9445
Windows 11 Version 23H2 for ARM64-based Systems 10.0.22631.7582
Microsoft / Windows 11 Version 23H2 for ARM64-based Systems
10.0.22631.7582
Windows 11 Version 23H2 for x64-based Systems 10.0.22631.7582
Microsoft / Windows 11 Version 23H2 for x64-based Systems
10.0.22631.7582
Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.9445
Microsoft / Windows 11 Version 24H2 for ARM64-based Systems
10.0.26100.9445
Windows 11 Version 24H2 for x64-based Systems 10.0.26100.9445
Microsoft / Windows 11 Version 24H2 for x64-based Systems
10.0.26100.9445
Windows Server 2025 10.0.26100.33438
Microsoft / Windows Server 2025
10.0.26100.33438
Windows 11 version 26H1 for x64-based Systems 10.0.28000.2954
Microsoft / Windows 11 version 26H1 for x64-based Systems
10.0.28000.2954
Windows 11 Version 26H1 for ARM64-based Systems 10.0.28000.2954
Microsoft / Windows 11 Version 26H1 for ARM64-based Systems
10.0.28000.2954
Windows 10 Version 1607 for 32-bit Systems 10.0.14393.9512
Microsoft / Windows 10 Version 1607 for 32-bit Systems
10.0.14393.9512
Windows 10 Version 1607 for x64-based Systems 10.0.14393.9512
Microsoft / Windows 10 Version 1607 for x64-based Systems
10.0.14393.9512
Windows Server 2016 10.0.14393.9512
Microsoft / Windows Server 2016
10.0.14393.9512
Windows Server 2016 (Server Core installation) 10.0.14393.9512
Microsoft / Windows Server 2016 (Server Core installation)
10.0.14393.9512
Product Identifier Version Remediation
Windows 10 Version 1809 for 32-bit Systems <10.0.17763.9245
Microsoft / Windows 10 Version 1809 for 32-bit Systems
<10.0.17763.9245
Vendor Fix fix
Windows 10 Version 1809 for x64-based Systems <10.0.17763.9245
Microsoft / Windows 10 Version 1809 for x64-based Systems
<10.0.17763.9245
Vendor Fix fix
Windows Server 2019 <10.0.17763.9245
Microsoft / Windows Server 2019
<10.0.17763.9245
Vendor Fix fix
Windows Server 2019 (Server Core installation) <10.0.17763.9245
Microsoft / Windows Server 2019 (Server Core installation)
<10.0.17763.9245
Vendor Fix fix
Windows Server 2022 <10.0.20348.5622
Microsoft / Windows Server 2022
<10.0.20348.5622
Vendor Fix fix
Windows Server 2022 (Server Core installation) <10.0.20348.5622
Microsoft / Windows Server 2022 (Server Core installation)
<10.0.20348.5622
Vendor Fix fix
Windows 10 Version 21H2 for 32-bit Systems <10.0.19044.7725
Microsoft / Windows 10 Version 21H2 for 32-bit Systems
<10.0.19044.7725
Vendor Fix fix
Windows 10 Version 21H2 for ARM64-based Systems <10.0.19044.7725
Microsoft / Windows 10 Version 21H2 for ARM64-based Systems
<10.0.19044.7725
Vendor Fix fix
Windows 10 Version 21H2 for x64-based Systems <10.0.19044.7725
Microsoft / Windows 10 Version 21H2 for x64-based Systems
<10.0.19044.7725
Vendor Fix fix
Windows 10 Version 22H2 for x64-based Systems <10.0.19045.7725
Microsoft / Windows 10 Version 22H2 for x64-based Systems
<10.0.19045.7725
Vendor Fix fix
Windows 10 Version 22H2 for ARM64-based Systems <10.0.19045.7725
Microsoft / Windows 10 Version 22H2 for ARM64-based Systems
<10.0.19045.7725
Vendor Fix fix
Windows 10 Version 22H2 for 32-bit Systems <10.0.19045.7725
Microsoft / Windows 10 Version 22H2 for 32-bit Systems
<10.0.19045.7725
Vendor Fix fix
Windows Server 2025 (Server Core installation) <10.0.26100.33438
Microsoft / Windows Server 2025 (Server Core installation)
<10.0.26100.33438
Vendor Fix fix
Windows 11 Version 25H2 for ARM64-based Systems <10.0.26200.9445
Microsoft / Windows 11 Version 25H2 for ARM64-based Systems
<10.0.26200.9445
Vendor Fix fix
Windows 11 Version 25H2 for x64-based Systems <10.0.26200.9445
Microsoft / Windows 11 Version 25H2 for x64-based Systems
<10.0.26200.9445
Vendor Fix fix
Windows 11 Version 23H2 for ARM64-based Systems <10.0.22631.7582
Microsoft / Windows 11 Version 23H2 for ARM64-based Systems
<10.0.22631.7582
Vendor Fix fix
Windows 11 Version 23H2 for x64-based Systems <10.0.22631.7582
Microsoft / Windows 11 Version 23H2 for x64-based Systems
<10.0.22631.7582
Vendor Fix fix
Windows 11 Version 24H2 for ARM64-based Systems <10.0.26100.9445
Microsoft / Windows 11 Version 24H2 for ARM64-based Systems
<10.0.26100.9445
Vendor Fix fix
Windows 11 Version 24H2 for x64-based Systems <10.0.26100.9445
Microsoft / Windows 11 Version 24H2 for x64-based Systems
<10.0.26100.9445
Vendor Fix fix
Windows Server 2025 <10.0.26100.33438
Microsoft / Windows Server 2025
<10.0.26100.33438
Vendor Fix fix
Windows 11 version 26H1 for x64-based Systems <10.0.28000.2954
Microsoft / Windows 11 version 26H1 for x64-based Systems
<10.0.28000.2954
Vendor Fix fix
Windows 11 Version 26H1 for ARM64-based Systems <10.0.28000.2954
Microsoft / Windows 11 Version 26H1 for ARM64-based Systems
<10.0.28000.2954
Vendor Fix fix
Windows 10 Version 1607 for 32-bit Systems <10.0.14393.9512
Microsoft / Windows 10 Version 1607 for 32-bit Systems
<10.0.14393.9512
Vendor Fix fix
Windows 10 Version 1607 for x64-based Systems <10.0.14393.9512
Microsoft / Windows 10 Version 1607 for x64-based Systems
<10.0.14393.9512
Vendor Fix fix
Windows Server 2016 <10.0.14393.9512
Microsoft / Windows Server 2016
<10.0.14393.9512
Vendor Fix fix
Windows Server 2016 (Server Core installation) <10.0.14393.9512
Microsoft / Windows Server 2016 (Server Core installation)
<10.0.14393.9512
Vendor Fix fix

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        "title": "Additional Resources"
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        "title": "Disclaimer"
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        "url": "https://www.first.org/cvss"
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    "title": "Windows Biometric Service Elevation of Privilege Vulnerability",
    "tracking": {
      "current_release_date": "2026-09-08T07:00:00.000Z",
      "generator": {
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  "vulnerabilities": [
    {
      "cve": "CVE-2026-83971",
      "cwe": {
        "id": "CWE-122",
        "name": "Heap-based Buffer Overflow"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
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      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2026-83971 Windows Biometric Service Elevation of Privilege Vulnerability - VEX",
          "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-83971.json"
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            "23"
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          "url": "https://support.microsoft.com/help/5123099"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 6.8,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
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          ]
        }
      ],
      "title": "Windows Biometric Service Elevation of Privilege Vulnerability"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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