CVE-2026-80083

Published: Sep 8, 2026Modified: Sep 10, 2026

8.8

Vector

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

Exploitability: 2.0 / Impact: 6.0

Source: secure@microsoft.com (Secondary)

Description

Untrusted pointer dereference in Windows Hyper-V allows an authorized attacker to execute code locally.

Affected (10)

Products: Microsoft: Windows 11 23h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2022, Windows Server 2025

6 products

Windows 11 23h2

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2022

Windows Server 2025

Configuration A

10 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 11 23h2	version < 10.0.22631.7582
Microsoft Windows 11 23h2	version < 10.0.22631.7582
Microsoft Windows 11 24h2	version < 10.0.26100.9445
Microsoft Windows 11 24h2	version < 10.0.26100.9445
Microsoft Windows 11 25h2	version < 10.0.26200.9445
Microsoft Windows 11 25h2	version < 10.0.26200.9445
Microsoft Windows 11 26h1	version < 10.0.28000.2954
Microsoft Windows 11 26h1	version < 10.0.28000.2954
Microsoft Windows Server 2022	version < 10.0.20348.5622
Microsoft Windows Server 2025	version < 10.0.26100.33438

Related CWEs

Untrusted Pointer Dereference

The product obtains a value from an untrusted source, converts this value to a pointer, and dereferences the resulting pointer.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80083

Source: secure@microsoft.com

PatchVendor Advisory

Timeline

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