Windows Remote Desktop Services Elevation of Privilege Vulnerability
CVE-2026-21533 is fixed in 31 products on 1 platform, first by KB5075999, released February 10, 2026. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on February 10, 2026. Patch Radar priority: Patch now.
<p>Improper privilege management in Windows Remote Desktop allows an authorized attacker to elevate privileges 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 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 2012 | KB5075971 | Feb 10, 2026 | |
| Windows Server 2012 (Server Core installation) | KB5075971 | 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 |
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