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CVE-2026-83931

Last refreshed2026-10-15

Status: UPDATED  |  Advisory ID: CVE-2026-83931

Key Details

CVECVE-2026-83931
CVSS Score / Version
7.8 (High) / CVSS v3.1
Updated2026-10-13
CVSS Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS Prose
attack vector is local; attack complexity is high; privileges required is low; user interaction is none; scope is changed; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
see table below
Classified as
CWE-122 (Heap-based Buffer Overflow)

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
MicrosoftWindows 11 (version 23H2)
MicrosoftWindows 11 (version 24H2)
MicrosoftWindows 11 (version 25H2)
MicrosoftWindows 11 (version 26H1)
MicrosoftWindows Server 2025
MicrosoftWindows Server 2022
MicrosoftWindows 11 Version 26H2
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

Heap-based buffer overflow in Windows Hyper-V allows an authorized attacker to execute code locally.

What to Do

Monitor Microsoft's web page for any future patch releases.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-83931
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-83931

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