CVE-2026-21222
Windows Kernel Information Disclosure Vulnerability
CVE-2026-21222 is fixed in 25 products on 1 platform, first by KB5075999, released February 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
5.5
Important
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0060
48th percentile
<p>Insertion of sensitive information into log file in Windows Kernel allows an authorized attacker to disclose information locally.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Windows 10 Version 1607 for 32-bit Systems | 14393.8868 | KB5075999 | Feb 10, 2026 |
| Windows 10 Version 1607 for x64-based Systems | 14393.8868 | KB5075999 | Feb 10, 2026 |
| Windows 10 Version 1809 for 32-bit Systems | 17763.8389 | KB5075904 | Feb 10, 2026 |
| Windows 10 Version 1809 for x64-based Systems | 17763.8389 | KB5075904 | Feb 10, 2026 |
| Windows 10 Version 21H2 for 32-bit Systems | KB5075912 | Feb 10, 2026 | |
| Windows 10 Version 21H2 for ARM64-based Systems | KB5075912 | Feb 10, 2026 | |
| Windows 10 Version 21H2 for x64-based Systems | KB5075912 | Feb 10, 2026 | |
| Windows 10 Version 22H2 for 32-bit Systems | KB5075912 | Feb 10, 2026 | |
| Windows 10 Version 22H2 for ARM64-based Systems | KB5075912 | Feb 10, 2026 | |
| Windows 10 Version 22H2 for x64-based Systems | KB5075912 | Feb 10, 2026 | |
| 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 Server 2012 R2 | KB5075970 | Feb 10, 2026 | |
| Windows Server 2012 R2 (Server Core installation) | KB5075970 | Feb 10, 2026 | |
| Windows Server 2016 | 14393.8868 | KB5075999 | Feb 10, 2026 |
| Windows Server 2016 (Server Core installation) | 14393.8868 | KB5075999 | Feb 10, 2026 |
| Windows Server 2019 | 17763.8389 | KB5075904 | Feb 10, 2026 |
| Windows Server 2019 (Server Core installation) | 17763.8389 | KB5075904 | Feb 10, 2026 |
| Windows Server 2022 | 20348.4773 | KB5075906 | Feb 10, 2026 |
| Windows Server 2022 | 20348.4711 | KB5075943 | Feb 10, 2026 |
| Windows Server 2022 (Server Core installation) | 20348.4773 | KB5075906 | Feb 10, 2026 |
| Windows Server 2022 (Server Core installation) | 20348.4711 | KB5075943 | 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.