CVE-2026-83716 Windows Hyper-V - Buffer Overflow

Windows Hyper-V contains a heap-based buffer overflow caused by improper memory handling, letting authorized attackers execute code locally, exploit requires local access with authorization.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.32% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
13 October 2026
Updated
15 October 2026
Weakness
CWE-122

Vendor fix

Update to the latest available version of Windows Hyper-V.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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