Untrusted Pointer Dereference in Microsoft Windows and Windows Server - CVE-2026-80083
Published: September 9, 2026
Vulnerability identifier: #VU148255
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-80083
CWE-ID: CWE-822
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to untrusted pointer dereference in Windows Hyper-V when processing a specially crafted application on a Hyper-V guest. A local user can run a specially crafted application on a Hyper-V guest to execute arbitrary code.
The code executes on the Hyper-V host operating system.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-80083
Install security update from vendor's website.
Microsoft Windows - addressed in versions 11 23H2 10.0.22631.7582, 11 24H2 10.0.26100.9445, 11 25H2 10.0.26200.9445, 11 26H1 10.0.28000.2954
Windows Server - addressed in versions 2022 10.0.20348.5622, 2025 10.0.26100.33438
Windows Server - addressed in versions 2022 10.0.20348.5622, 2025 10.0.26100.33438