Vulnerability-Lookup

BDU:2026-14537 (CVE-2026-83991)

Vulnerability from fstec – Published: 2026-09-14 – Updated: 2026-09-14 – View on bdu.fstec.ru Exploit publicly available Fixed

Title

Уязвимость драйвера Windows Cloud Files Mini Filter Driver операционных систем Windows, позволяющая нарушителю обойти существующие механизмы безопасности и оказать воздействия на целостность защищаемой информации

Summary

Уязвимость драйвера Windows Cloud Files Mini Filter Driver операционных систем Windows связана с отсутствием аутентификации для критичной функции. Эксплуатация уязвимости может позволить нарушителю обойти существующие механизмы безопасности и оказать воздействия на целостность защищаемой информации

Severity

4.6 (Medium) CVSS 2.0


                      
                        AV:L/AC:L/Au:S/C:N/I:C/A:N

5.5 (Medium) CVSS 3.1


                      
                        CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Class

Code vulnerability

Status

Confirmed by the vendor

Exploitation

Authentication bypass

Incidents

Being clarified

Remediation

Software update

CWE

CWE-306 - Отсутствие аутентификации для критичной функции

Aliases

CVE-2026-83991

References

3 references

URL
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83991
https://github.com/ZeroDayVPN/CVE-2026-83991-WriteUP-and-PoC
https://github.com/karollooool/CVE-2026-83991-writeup-and-poc

Impacted products

13 products from 1 vendor

Vendors

Microsoft Corp

Products

Windows 10 22H2, Windows 10 21H2, Windows Server 2022 (Server Core installation), Windows Server 2022, Windows Server 2019 (Server Core installation), Windows Server 2019, Windows 10 1809, Windows 11 23H2, Windows 11 26H1, Windows Server 2025, Windows 11 24H2, Windows 11 25H2, Windows Server 2025 (Server Core installation)

Versions

до 10.0.19045.7725 (Windows 10 22H2), до 10.0.19044.7725 (Windows 10 21H2), до 10.0.20348.5622 (Windows Server 2022 (Server Core installation)), до 10.0.20348.5622 (Windows Server 2022), до 10.0.17763.9245 (Windows Server 2019 (Server Core installation)), до 10.0.17763.9245 (Windows Server 2019), до 10.0.17763.9245 (Windows 10 1809), до 10.0.22631.7582 (Windows 11 23H2), до 10.0.28000.2954 (Windows 11 26H1), до 10.0.26100.33438 (Windows Server 2025), до 10.0.26100.9445 (Windows 11 24H2), до 10.0.26200.9445 (Windows 11 25H2), до 10.0.26100.33438 (Windows Server 2025 (Server Core installation))

Product types

Operating system

Platforms

Microsoft Corp Windows 10 22H2 до 10.0.19045.7725 32-bit, Microsoft Corp Windows 10 22H2 до 10.0.19045.7725 ARM64, Microsoft Corp Windows 10 22H2 до 10.0.19045.7725 64-bit, Microsoft Corp Windows 10 21H2 до 10.0.19044.7725 64-bit, Microsoft Corp Windows 10 21H2 до 10.0.19044.7725 ARM64, Microsoft Corp Windows 10 21H2 до 10.0.19044.7725 32-bit, Microsoft Corp Windows Server 2022 (Server Core installation) до 10.0.20348.5622, Microsoft Corp Windows Server 2022 до 10.0.20348.5622, Microsoft Corp Windows Server 2019 (Server Core installation) до 10.0.17763.9245, Microsoft Corp Windows Server 2019 до 10.0.17763.9245, Microsoft Corp Windows 10 1809 до 10.0.17763.9245 64-bit, Microsoft Corp Windows 10 1809 до 10.0.17763.9245 32-bit, Microsoft Corp Windows 11 23H2 до 10.0.22631.7582 64-bit, Microsoft Corp Windows 11 23H2 до 10.0.22631.7582 ARM64, Microsoft Corp Windows 11 26H1 до 10.0.28000.2954 ARM64, Microsoft Corp Windows 11 26H1 до 10.0.28000.2954 64-bit, Microsoft Corp Windows Server 2025 до 10.0.26100.33438, Microsoft Corp Windows 11 24H2 до 10.0.26100.9445 64-bit, Microsoft Corp Windows 11 24H2 до 10.0.26100.9445 ARM64, Microsoft Corp Windows 11 25H2 до 10.0.26200.9445 64-bit, Microsoft Corp Windows 11 25H2 до 10.0.26200.9445 ARM64, Microsoft Corp Windows Server 2025 (Server Core installation) до 10.0.26100.33438

Mitigations

Использование рекомендаций производителя: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83991

JSON

To clipboard

{
  "CVSS 2.0": "AV:L/AC:L/Au:S/C:N/I:C/A:N",
  "CVSS 3.0": "AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
  "CVSS 4.0": null,
  "remediation_\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": null,
  "remediation_\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435": null,
  "\u0412\u0435\u043d\u0434\u043e\u0440 \u041f\u041e": "Microsoft Corp",
  "\u0412\u0435\u0440\u0441\u0438\u044f \u041f\u041e": "\u0434\u043e 10.0.19045.7725 (Windows 10 22H2), \u0434\u043e 10.0.19044.7725 (Windows 10 21H2), \u0434\u043e 10.0.20348.5622 (Windows Server 2022 (Server Core installation)), \u0434\u043e 10.0.20348.5622 (Windows Server 2022), \u0434\u043e 10.0.17763.9245 (Windows Server 2019 (Server Core installation)), \u0434\u043e 10.0.17763.9245 (Windows Server 2019), \u0434\u043e 10.0.17763.9245 (Windows 10 1809), \u0434\u043e 10.0.22631.7582 (Windows 11 23H2), \u0434\u043e 10.0.28000.2954 (Windows 11 26H1), \u0434\u043e 10.0.26100.33438 (Windows Server 2025), \u0434\u043e 10.0.26100.9445 (Windows 11 24H2), \u0434\u043e 10.0.26200.9445 (Windows 11 25H2), \u0434\u043e 10.0.26100.33438 (Windows Server 2025 (Server Core installation))",
  "\u0412\u043e\u0437\u043c\u043e\u0436\u043d\u044b\u0435 \u043c\u0435\u0440\u044b \u043f\u043e \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044e": "\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0430\u0446\u0438\u0439 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044f:\nhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83991",
  "\u0414\u0430\u0442\u0430 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u044f": "08.09.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f": "14.09.2026",
  "\u0414\u0430\u0442\u0430 \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438": "14.09.2026",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440": "BDU:2026-14537",
  "\u0418\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u043e\u043f\u0438\u0441\u0430\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "CVE-2026-83991",
  "\u0418\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430",
  "\u041a\u043b\u0430\u0441\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043e\u0434\u0430",
  "\u041d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u041f\u041e": "Windows 10 22H2, Windows 10 21H2, Windows Server 2022 (Server Core installation), Windows Server 2022, Windows Server 2019 (Server Core installation), Windows Server 2019, Windows 10 1809, Windows 11 23H2, Windows 11 26H1, Windows Server 2025, Windows 11 24H2, Windows 11 25H2, Windows Server 2025 (Server Core installation)",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u041e\u0421 \u0438 \u0442\u0438\u043f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b": "Microsoft Corp Windows 10 22H2 \u0434\u043e 10.0.19045.7725 32-bit, Microsoft Corp Windows 10 22H2 \u0434\u043e 10.0.19045.7725 ARM64, Microsoft Corp Windows 10 22H2 \u0434\u043e 10.0.19045.7725 64-bit, Microsoft Corp Windows 10 21H2 \u0434\u043e 10.0.19044.7725 64-bit, Microsoft Corp Windows 10 21H2 \u0434\u043e 10.0.19044.7725 ARM64, Microsoft Corp Windows 10 21H2 \u0434\u043e 10.0.19044.7725 32-bit, Microsoft Corp Windows Server 2022 (Server Core installation) \u0434\u043e 10.0.20348.5622 , Microsoft Corp Windows Server 2022 \u0434\u043e 10.0.20348.5622 , Microsoft Corp Windows Server 2019 (Server Core installation) \u0434\u043e 10.0.17763.9245 , Microsoft Corp Windows Server 2019 \u0434\u043e 10.0.17763.9245 , Microsoft Corp Windows 10 1809 \u0434\u043e 10.0.17763.9245 64-bit, Microsoft Corp Windows 10 1809 \u0434\u043e 10.0.17763.9245 32-bit, Microsoft Corp Windows 11 23H2 \u0434\u043e 10.0.22631.7582 64-bit, Microsoft Corp Windows 11 23H2 \u0434\u043e 10.0.22631.7582 ARM64, Microsoft Corp Windows 11 26H1 \u0434\u043e 10.0.28000.2954 ARM64, Microsoft Corp Windows 11 26H1 \u0434\u043e 10.0.28000.2954 64-bit, Microsoft Corp Windows Server 2025 \u0434\u043e 10.0.26100.33438 , Microsoft Corp Windows 11 24H2 \u0434\u043e 10.0.26100.9445 64-bit, Microsoft Corp Windows 11 24H2 \u0434\u043e 10.0.26100.9445 ARM64, Microsoft Corp Windows 11 25H2 \u0434\u043e 10.0.26200.9445 64-bit, Microsoft Corp Windows 11 25H2 \u0434\u043e 10.0.26200.9445 ARM64, Microsoft Corp Windows Server 2025 (Server Core installation) \u0434\u043e 10.0.26100.33438 ",
  "\u041d\u0430\u0438\u043c\u0435\u043d\u043e\u0432\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 Windows Cloud Files Mini Filter Driver \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c Windows, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u043e\u0431\u043e\u0439\u0442\u0438 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0435 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u044b \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0438 \u043e\u043a\u0430\u0437\u0430\u0442\u044c \u0432\u043e\u0437\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u043d\u0430 \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u0449\u0438\u0449\u0430\u0435\u043c\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438",
  "\u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u044d\u043a\u0441\u043f\u043b\u043e\u0439\u0442\u0430": "\u0421\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442 \u0432 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u043c \u0434\u043e\u0441\u0442\u0443\u043f\u0435",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "\u041e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0435 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0434\u043b\u044f \u043a\u0440\u0438\u0442\u0438\u0447\u043d\u043e\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 (CWE-306)",
  "\u041e\u043f\u0438\u0441\u0430\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430 Windows Cloud Files Mini Filter Driver \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c Windows \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0435\u043c \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0434\u043b\u044f \u043a\u0440\u0438\u0442\u0438\u0447\u043d\u043e\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u0438. \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043d\u0430\u0440\u0443\u0448\u0438\u0442\u0435\u043b\u044e \u043e\u0431\u043e\u0439\u0442\u0438 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0435 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u044b \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0438 \u043e\u043a\u0430\u0437\u0430\u0442\u044c \u0432\u043e\u0437\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u043d\u0430 \u0446\u0435\u043b\u043e\u0441\u0442\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u0449\u0438\u0449\u0430\u0435\u043c\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438",
  "\u041f\u043e\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": null,
  "\u041f\u0440\u043e\u0447\u0430\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f": null,
  "\u0421\u0432\u044f\u0437\u044c \u0441 \u0438\u043d\u0446\u0438\u0434\u0435\u043d\u0442\u0430\u043c\u0438 \u0418\u0411": "\u0414\u0430\u043d\u043d\u044b\u0435 \u0443\u0442\u043e\u0447\u043d\u044f\u044e\u0442\u0441\u044f",
  "\u0421\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f": "\u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u043d\u043e\u0433\u043e \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044f",
  "\u0421\u043f\u043e\u0441\u043e\u0431 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438": "\u041d\u0430\u0440\u0443\u0448\u0435\u043d\u0438\u0435 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438",
  "\u0421\u0441\u044b\u043b\u043a\u0438 \u043d\u0430 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0438": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83991\nhttps://github.com/ZeroDayVPN/CVE-2026-83991-WriteUP-and-PoC\nhttps://github.com/karollooool/CVE-2026-83991-writeup-and-poc",
  "\u0421\u0442\u0430\u0442\u0443\u0441 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u041f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u0435\u043c",
  "\u0422\u0438\u043f \u041f\u041e": "\u041e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u0430\u044f \u0441\u0438\u0441\u0442\u0435\u043c\u0430",
  "\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 CWE": "CWE-306",
  "\u0423\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438": "\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 2.0 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 4,6)\n\u0421\u0440\u0435\u0434\u043d\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (\u0431\u0430\u0437\u043e\u0432\u0430\u044f \u043e\u0446\u0435\u043d\u043a\u0430 CVSS 3.1 \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 5,5)"
}

CVE-2026-83991 (GCVE-0-2026-83991)

Vulnerability from cvelistv5 – Published: 2026-09-08 17:14 – Updated: 2026-09-16 21:54

Title

Windows Cloud Files Mini Filter Driver Tampering Vulnerability

Summary

Missing authentication for critical function in Windows Cloud Files Mini Filter Driver allows an authorized attacker to perform tampering locally.

Severity

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-09 18:34 UTC

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

microsoft mitre root

References

1 reference

URL	Tags
https://msrc.microsoft.com/update-guide/vulnerabi…	vendor-advisorypatch

Impacted products

13 products

Vendor	Product	Version
Microsoft	Windows 10 Version 1809	Affected: 10.0.17763.0 , < 10.0.17763.9245 (custom)
Microsoft	Windows 10 Version 21H2	Affected: 10.0.19044.0 , < 10.0.19044.7725 (custom)
Microsoft	Windows 10 Version 22H2	Affected: 10.0.19045.0 , < 10.0.19045.7725 (custom)
Microsoft	Windows 11 version 23H2	Affected: 10.0.22631.0 , < 10.0.22631.7582 (custom)
Microsoft	Windows 11 Version 23H2	Affected: 10.0.22631.0 , < 10.0.22631.7582 (custom)
Microsoft	Windows 11 Version 24H2	Affected: 10.0.26100.0 , < 10.0.26100.9445 (custom)
Microsoft	Windows 11 Version 25H2	Affected: 10.0.26200.0 , < 10.0.26200.9445 (custom)
Microsoft	Windows 11 version 26H1	Affected: 10.0.28000.0 , < 10.0.28000.2954 (custom)
Microsoft	Windows Server 2019	Affected: 10.0.17763.0 , < 10.0.17763.9245 (custom)
Microsoft	Windows Server 2019 (Server Core installation)	Affected: 10.0.17763.0 , < 10.0.17763.9245 (custom)
Microsoft	Windows Server 2022	Affected: 10.0.20348.0 , < 10.0.20348.5622 (custom)
Microsoft	Windows Server 2025	Affected: 10.0.26100.0 , < 10.0.26100.33438 (custom)
Microsoft	Windows Server 2025 (Server Core installation)	Affected: 10.0.26100.0 , < 10.0.26100.33438 (custom)

Date Public

2026-09-08 14:00

Show details on NVD website

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-83991",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-09T18:34:37.479939Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-09T18:34:59.438Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
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          "product": "Windows 11 version 26H1",
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          "versions": [
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              "version": "10.0.28000.0",
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        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.17763.9245",
              "status": "affected",
              "version": "10.0.17763.0",
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            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2019 (Server Core installation)",
          "vendor": "Microsoft",
          "versions": [
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              "status": "affected",
              "version": "10.0.17763.0",
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            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2022",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "10.0.20348.5622",
              "status": "affected",
              "version": "10.0.20348.0",
              "versionType": "custom"
            }
          ]
        },
        {
          "platforms": [
            "x64-based Systems"
          ],
          "product": "Windows Server 2025",
          "vendor": "Microsoft",
          "versions": [
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              "status": "affected",
              "version": "10.0.26100.0",
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        },
        {
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          ],
          "product": "Windows Server 2025 (Server Core installation)",
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              "status": "affected",
              "version": "10.0.26100.0",
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            }
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                },
                {
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      "datePublic": "2026-09-08T14:00:00.000Z",
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        {
          "lang": "en-US",
          "value": "Missing authentication for critical function in Windows Cloud Files Mini Filter Driver allows an authorized attacker to perform tampering locally."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C",
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              "description": "CWE-306: Missing Authentication for Critical Function",
              "lang": "en-US",
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            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T21:54:14.933Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
        {
          "name": "Windows Cloud Files Mini Filter Driver Tampering Vulnerability",
          "tags": [
            "vendor-advisory",
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          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83991"
        }
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    "cveId": "CVE-2026-83991",
    "datePublished": "2026-09-08T17:14:16.048Z",
    "dateReserved": "2026-09-01T01:02:23.997Z",
    "dateUpdated": "2026-09-16T21:54:14.933Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.