7.8

CVE-2026-58632

Windows Win32 Kernel Subsystem Elevation of Privilege Vulnerability

Use after free in Windows Win32K allows an authorized attacker to elevate privileges locally.
Data is provided by the National Vulnerability Database (NVD)
Microsoft ≫ Windows 10 1607 HwPlatform x64 Version < 10.0.14393.9339
Microsoft ≫ Windows 10 1607 HwPlatform x86 Version < 10.0.14393.9339
Microsoft ≫ Windows 10 1809 HwPlatform x64 Version < 10.0.17763.9020
Microsoft ≫ Windows 10 1809 HwPlatform x86 Version < 10.0.17763.9020
Microsoft ≫ Windows 10 21h2 HwPlatform arm64 Version < 10.0.19044.7548
Microsoft ≫ Windows 10 21h2 HwPlatform x64 Version < 10.0.19044.7548
Microsoft ≫ Windows 10 21h2 HwPlatform x86 Version < 10.0.19044.7548
Microsoft ≫ Windows 10 22h2 HwPlatform arm64 Version < 10.0.19045.7548
Microsoft ≫ Windows 10 22h2 HwPlatform x64 Version < 10.0.19045.7548
Microsoft ≫ Windows 10 22h2 HwPlatform x86 Version < 10.0.19045.7548
Microsoft ≫ Windows 11 24h2 HwPlatform arm64 Version < 10.0.26100.8875
Microsoft ≫ Windows 11 24h2 HwPlatform x64 Version < 10.0.26100.8875
Microsoft ≫ Windows 11 25h2 HwPlatform arm64 Version < 10.0.26200.8875
Microsoft ≫ Windows 11 25h2 HwPlatform x64 Version < 10.0.26200.8875
Microsoft ≫ Windows 11 26h1 HwPlatform arm64 Version < 10.0.28000.2269
Microsoft ≫ Windows 11 26h1 HwPlatform x64 Version < 10.0.28000.2269
Microsoft ≫ Windows Server 2016 SwEdition - HwPlatform x64 Version < 10.0.14393.9339
Microsoft ≫ Windows Server 2019 SwEdition - HwPlatform x64 Version < 10.0.17763.9020
Microsoft ≫ Windows Server 2022 HwPlatform x64 Version < 10.0.20348.5386
Microsoft ≫ Windows Server 2025 HwPlatform x64 Version < 10.0.26100.33158
VulnDex Vulnerability Enrichment
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No warning was found for this CVE.
EPSS Metrics
Type Source Score Percentile
EPSS FIRST.org 0.29% 0.209
CVSS Metrics
Source Base Score Exploit Score Impact Score Vector string
Microsoft 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58632
Patch
Vendor Advisory