CVE-2026-65678

HighCVSS 7.0/10Last modified Aug 16, 2026

Description

Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.

Metrics

CVSS 3.1 7.0/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

Vendor	Product	Versions
Microsoft	Windows 10 Version 1607	>= 10.0.14393.0, < 10.0.14393.9418
Microsoft	Windows 10 Version 1809	>= 10.0.17763.0, < 10.0.17763.9121
Microsoft	Windows 10 Version 21H2	>= 10.0.19044.0, < 10.0.19044.7663
Microsoft	Windows 10 Version 22H2	>= 10.0.19045.0, < 10.0.19045.7663
Microsoft	Windows 11 version 23H2	>= 10.0.22631.0, < 10.0.22631.7517
Microsoft	Windows 11 Version 23H2	>= 10.0.22631.0, < 10.0.22631.7517
Microsoft	Windows 11 Version 24H2	>= 10.0.26100.0, < 10.0.26100.9168
Microsoft	Windows 11 Version 25H2	>= 10.0.26200.0, < 10.0.26200.9168
Microsoft	Windows 11 version 26H1	>= 10.0.28000.0, < 10.0.28000.2704
Microsoft	Windows Server 2016	>= 10.0.14393.0, < 10.0.14393.9418
Microsoft	Windows Server 2016 (Server Core installation)	>= 10.0.14393.0, < 10.0.14393.9418
Microsoft	Windows Server 2019	>= 10.0.17763.0, < 10.0.17763.9121
Microsoft	Windows Server 2019 (Server Core installation)	>= 10.0.17763.0, < 10.0.17763.9121
Microsoft	Windows Server 2022	>= 10.0.20348.0, < 10.0.20348.5499
Microsoft	Windows Server 2025	>= 10.0.26100.0, < 10.0.26100.33296
Microsoft	Windows Server 2025 (Server Core installation)	>= 10.0.26100.0, < 10.0.26100.33296

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65678Patch, Vendor Advisory

Timeline

Published: Aug 11, 2026
Last modified: Aug 16, 2026
NVD status: Analyzed

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