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CVE-2026-83766 Details

Description

Incorrect authorization in Windows Hyper-V allows an authorized attacker to bypass a security feature over an adjacent network.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:4.2 MEDIUMVector:CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83766	[email protected]	PatchVendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-863	Incorrect Authorization	[email protected]

Affected Products

Product	Versions
microsoft windows 10 1607	< 10.0.14393.9612
CPE cpe:2.3:o:microsoft:windows_10_1607:::::::x64:* Remediation No remediation found in references.
microsoft windows 10 1809	< 10.0.17763.9376
CPE cpe:2.3:o:microsoft:windows_10_1809:::::::x64:* cpe:2.3:o:microsoft:windows_10_1809:::::::x86:* Remediation No remediation found in references.
microsoft windows 10 21h2	< 10.0.19044.7807
CPE cpe:2.3:o:microsoft:windows_10_21h2:::::::arm64:* cpe:2.3:o:microsoft:windows_10_21h2:::::::x64:* cpe:2.3:o:microsoft:windows_10_21h2:::::::x86:* Remediation No remediation found in references.
microsoft windows 10 22h2	< 10.0.19045.7807
CPE cpe:2.3:o:microsoft:windows_10_22h2:::::::arm64:* cpe:2.3:o:microsoft:windows_10_22h2:::::::x64:* cpe:2.3:o:microsoft:windows_10_22h2:::::::x86:* Remediation No remediation found in references.
microsoft windows 11 23h2	< 10.0.22631.7652
CPE cpe:2.3:o:microsoft:windows_11_23h2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_23h2:::::::x64:* Remediation No remediation found in references.
microsoft windows 11 24h2	< 10.0.26100.9711
CPE cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_24h2:::::::x64:* Remediation No remediation found in references.
microsoft windows 11 25h2	< 10.0.26200.9711
CPE cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_25h2:::::::x64:* Remediation No remediation found in references.
microsoft windows 11 26h1	< 10.0.28000.3231
CPE cpe:2.3:o:microsoft:windows_11_26h1:::::::arm64:* cpe:2.3:o:microsoft:windows_11_26h1:::::::x64:* Remediation No remediation found in references.
microsoft windows 11 26h2	< 10.0.26300.9711
CPE cpe:2.3:o:microsoft:windows_11_26h2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_26h2:::::::x64:* Remediation No remediation found in references.
microsoft windows server 2016	< 10.0.14393.9612
CPE cpe:2.3:o:microsoft:windows_server_2016:::::::x64:* Remediation No remediation found in references.
microsoft windows server 2019	< 10.0.17763.9376
CPE cpe:2.3:o:microsoft:windows_server_2019:::::::x64:* Remediation No remediation found in references.
microsoft windows server 2022	< 10.0.20348.5761
CPE cpe:2.3:o:microsoft:windows_server_2022:::::::x64:* Remediation No remediation found in references.
microsoft windows server 2025	< 10.0.26100.33650
CPE cpe:2.3:o:microsoft:windows_server_2025:::::::x64:* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Oct 29, 2026	Initial Analysis	[email protected]
Oct 16, 2026	CVE Modified	[email protected]
Oct 13, 2026	CVE Modified	CISA-ADP
Oct 13, 2026	New CVE Received	[email protected]

CVE-2026-83766 Details

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Affected Products

CPE

Remediation

CPE

Remediation

CPE

Remediation

CPE

Remediation

CPE

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CPE

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Change History

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