CVE-2026-21232
Windows HTTP.sys Elevation of Privilege Vulnerability
CVE-2026-21232 is fixed in 11 products on 1 platform, first by KB5075941, released February 10, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.8
Important
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0044
38th percentile
<p>Untrusted pointer dereference in Windows HTTP.sys allows an authorized attacker to elevate privileges locally.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Windows 11 Version 23H2 for ARM64-based Systems | 22631.6649 | KB5075941 | Feb 10, 2026 |
| Windows 11 Version 23H2 for x64-based Systems | 22631.6649 | KB5075941 | Feb 10, 2026 |
| Windows 11 Version 24H2 for ARM64-based Systems | KB5077212 | Feb 10, 2026 | |
| Windows 11 Version 24H2 for ARM64-based Systems | KB5077181 | Feb 10, 2026 | |
| Windows 11 Version 24H2 for x64-based Systems | KB5077212 | Feb 10, 2026 | |
| Windows 11 Version 24H2 for x64-based Systems | KB5077181 | Feb 10, 2026 | |
| Windows 11 Version 25H2 for ARM64-based Systems | KB5077212 | Feb 10, 2026 | |
| Windows 11 Version 25H2 for ARM64-based Systems | KB5077181 | Feb 10, 2026 | |
| Windows 11 Version 25H2 for x64-based Systems | KB5077212 | Feb 10, 2026 | |
| Windows 11 Version 25H2 for x64-based Systems | KB5077181 | Feb 10, 2026 | |
| Windows 11 Version 26H1 for ARM64-based Systems | 28000.1575 | KB5077179 | Feb 10, 2026 |
| Windows 11 version 26H1 for x64-based Systems | 28000.1575 | KB5077179 | Feb 10, 2026 |
| Windows Server 2022, 23H2 Edition (Server Core installation) | 25398.2149 | KB5075897 | Feb 10, 2026 |
| Windows Server 2025 | 26100.32313 | KB5075942 | Feb 10, 2026 |
| Windows Server 2025 | 26100.32370 | KB5075899 | Feb 10, 2026 |
| Windows Server 2025 (Server Core installation) | 26100.32313 | KB5075942 | Feb 10, 2026 |
| Windows Server 2025 (Server Core installation) | 26100.32370 | KB5075899 | Feb 10, 2026 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.