CVE-2021-33771
Windows Kernel Elevation of Privilege Vulnerability
CVE-2021-33771 is fixed in 30 products on 1 platform, first by KB5004238, released July 13, 2021. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on November 3, 2021. Patch Radar priority: Patch now.
Patch nowCISA KEV
CVSS
7.8
Important
Exploitation
Exploited
Reported by the vendor
CISA KEV
Nov 3, 2021
Federal due date Nov 17, 2021
EPSS
0.1017
95th percentile
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Windows 10 Version 1607 for 32-bit Systems | 14393.4530 | KB5004238 | Jul 13, 2021 |
| Windows 10 Version 1607 for x64-based Systems | 14393.4530 | KB5004238 | Jul 13, 2021 |
| Windows 10 Version 1809 for 32-bit Systems | 17763.2061 | KB5004244 | Jul 13, 2021 |
| Windows 10 Version 1809 for ARM64-based Systems | 17763.2061 | KB5004244 | Jul 13, 2021 |
| Windows 10 Version 1809 for x64-based Systems | 17763.2061 | KB5004244 | Jul 13, 2021 |
| Windows 10 Version 1909 for 32-bit Systems | 18363.1679 | KB5004245 | Jul 13, 2021 |
| Windows 10 Version 1909 for ARM64-based Systems | 18363.1679 | KB5004245 | Jul 13, 2021 |
| Windows 10 Version 1909 for x64-based Systems | 18363.1679 | KB5004245 | Jul 13, 2021 |
| Windows 10 Version 2004 for 32-bit Systems | KB5004237 | Jul 13, 2021 | |
| Windows 10 Version 2004 for ARM64-based Systems | KB5004237 | Jul 13, 2021 | |
| Windows 10 Version 2004 for x64-based Systems | KB5004237 | Jul 13, 2021 | |
| Windows 10 Version 20H2 for 32-bit Systems | KB5004237 | Jul 13, 2021 | |
| Windows 10 Version 20H2 for ARM64-based Systems | KB5004237 | Jul 13, 2021 | |
| Windows 10 Version 20H2 for x64-based Systems | KB5004237 | Jul 13, 2021 | |
| Windows 10 Version 21H1 for 32-bit Systems | KB5004237 | Jul 13, 2021 | |
| Windows 10 Version 21H1 for ARM64-based Systems | KB5004237 | Jul 13, 2021 | |
| Windows 10 Version 21H1 for x64-based Systems | KB5004237 | Jul 13, 2021 | |
| Windows 10 for 32-bit Systems | 10240.19003 | KB5004249 | Jul 13, 2021 |
| Windows 10 for x64-based Systems | 10240.19003 | KB5004249 | Jul 13, 2021 |
| Windows 8.1 for 32-bit systems | KB5004298 | Jul 13, 2021 | |
| Windows 8.1 for 32-bit systems | KB5004285 | Jul 13, 2021 | |
| Windows 8.1 for x64-based systems | KB5004298 | Jul 13, 2021 | |
| Windows 8.1 for x64-based systems | KB5004285 | Jul 13, 2021 | |
| Windows RT 8.1 | KB5004298 | Jul 13, 2021 | |
| Windows Server 2012 R2 | KB5004298 | Jul 13, 2021 | |
| Windows Server 2012 R2 | KB5004285 | Jul 13, 2021 | |
| Windows Server 2012 R2 (Server Core installation) | KB5004298 | Jul 13, 2021 | |
| Windows Server 2012 R2 (Server Core installation) | KB5004285 | Jul 13, 2021 | |
| Windows Server 2016 | 14393.4530 | KB5004238 | Jul 13, 2021 |
| Windows Server 2016 (Server Core installation) | 14393.4530 | KB5004238 | Jul 13, 2021 |
| Windows Server 2019 | 17763.2061 | KB5004244 | Jul 13, 2021 |
| Windows Server 2019 (Server Core installation) | 17763.2061 | KB5004244 | Jul 13, 2021 |
| Windows Server, version 2004 (Server Core installation) | KB5004237 | Jul 13, 2021 | |
| Windows Server, version 20H2 (Server Core Installation) | KB5004237 | Jul 13, 2021 | |
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