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TI-2021-13141 Aliases CVE-2021-33771GHSA-jv37-xg37-jxgp

Windows Kernel Elevation of Privilege Vulnerability

Priority CRITICAL 93Exploited in the wildPublished · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.

Summary

Windows Kernel Elevation of Privilege Vulnerability

Why it matters now

Exploitation Active In CISA KEV since 2021-11-03CISA due date 2021-11-17
EPSS 0.10172 95th percentileScored 2026-11-07
Fix Fixed Microsoft: 7 updates

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftWindows 10 Version 150710.0.10240.0 to before 10.0.10240.1900310.0.10240.19003Patch availableCNA
MicrosoftWindows 10 Version 160710.0.14393.0 to before 10.0.14393.453010.0.14393.4530Patch availableCNA
MicrosoftWindows 10 Version 180910.0.17763.0 to before 10.0.17763.206110.0.17763.2061Patch availableCNA
MicrosoftWindows 10 Version 180910.0.0 to before 10.0.17763.206110.0.17763.2061Patch availableCNA
MicrosoftWindows 10 Version 190910.0.0 to before 10.0.18363.167910.0.18363.1679Patch availableCNA
MicrosoftWindows 10 Version 200410.0.0 to before 10.0.19041.111010.0.19041.1110Patch availableCNA
MicrosoftWindows 10 Version 20H210.0.0 to before 10.0.19042.111010.0.19042.1110Patch availableCNA
MicrosoftWindows 10 Version 21H110.0.0 to before 10.0.19043.111010.0.19043.1110Patch availableCNA
MicrosoftWindows 8.16.3.0 to before 6.3.9600.200696.3.9600.20069Patch availableCNA
MicrosoftWindows Server 2012 R26.3.9600.0 to before 6.3.9600.200696.3.9600.20069Patch availableCNA
MicrosoftWindows Server 2012 R2 (Server Core installation)6.3.9600.0 to before 6.3.9600.200696.3.9600.20069Patch availableCNA
MicrosoftWindows Server 201610.0.14393.0 to before 10.0.14393.453010.0.14393.4530Patch availableCNA
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0 to before 10.0.14393.453010.0.14393.4530Patch availableCNA
MicrosoftWindows Server 201910.0.17763.0 to before 10.0.17763.206110.0.17763.2061Patch availableCNA
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0 to before 10.0.17763.206110.0.17763.2061Patch availableCNA
MicrosoftWindows Server version 200410.0.0 to before 10.0.19041.111010.0.19041.1110Patch availableCNA
MicrosoftWindows Server version 20H210.0.0 to before 10.0.19042.111010.0.19042.1110Patch availableCNA
  • Windows 10 Version 1507 VendorMicrosoft Affected 10.0.10240.0 to before 10.0.10240.19003 Fixed in 10.0.10240.19003 Patch available CNA
  • Windows 10 Version 1607 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.4530 Fixed in 10.0.14393.4530 Patch available CNA
  • Windows 10 Version 1809 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.2061 Fixed in 10.0.17763.2061 Patch available CNA
  • Windows 10 Version 1809 VendorMicrosoft Affected 10.0.0 to before 10.0.17763.2061 Fixed in 10.0.17763.2061 Patch available CNA
  • Windows 10 Version 1909 VendorMicrosoft Affected 10.0.0 to before 10.0.18363.1679 Fixed in 10.0.18363.1679 Patch available CNA
  • Windows 10 Version 2004 VendorMicrosoft Affected 10.0.0 to before 10.0.19041.1110 Fixed in 10.0.19041.1110 Patch available CNA
  • Windows 10 Version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19042.1110 Fixed in 10.0.19042.1110 Patch available CNA
  • Windows 10 Version 21H1 VendorMicrosoft Affected 10.0.0 to before 10.0.19043.1110 Fixed in 10.0.19043.1110 Patch available CNA
  • Windows 8.1 VendorMicrosoft Affected 6.3.0 to before 6.3.9600.20069 Fixed in 6.3.9600.20069 Patch available CNA
  • Windows Server 2012 R2 VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.20069 Fixed in 6.3.9600.20069 Patch available CNA
  • Windows Server 2012 R2 (Server Core installation) VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.20069 Fixed in 6.3.9600.20069 Patch available CNA
  • Windows Server 2016 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.4530 Fixed in 10.0.14393.4530 Patch available CNA
  • Windows Server 2016 (Server Core installation) VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.4530 Fixed in 10.0.14393.4530 Patch available CNA
  • Windows Server 2019 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.2061 Fixed in 10.0.17763.2061 Patch available CNA
  • Windows Server 2019 (Server Core installation) VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.2061 Fixed in 10.0.17763.2061 Patch available CNA
  • Windows Server version 2004 VendorMicrosoft Affected 10.0.0 to before 10.0.19041.1110 Fixed in 10.0.19041.1110 Patch available CNA
  • Windows Server version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19042.1110 Fixed in 10.0.19042.1110 Patch available CNA

CPE configurations NVD · 14

CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:*:*before 10.0.10240.19003VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:*before 10.0.14393.4530VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:*before 10.0.17763.2061VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:*before 10.0.18363.1679VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:*before 10.0.19041.1110VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:*before 10.0.19042.1110VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:*before 10.0.19043.1110VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:*before 10.0.19041.1110VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_10_1507:*:*:*:*:*:*:*:* Versions before 10.0.10240.19003 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:*:* Versions before 10.0.14393.4530 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:* Versions before 10.0.17763.2061 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:* Versions before 10.0.18363.1679 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:* Versions before 10.0.19041.1110 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:* Versions before 10.0.19042.1110 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:* Versions before 10.0.19043.1110 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:* Versions before 10.0.19041.1110 Vulnerable ·Microsoft
Show 4 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:microsoft:windows_server_2012:-:r2:*:*:*:*:*:*not specified by NVDVulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*before 10.0.14393.4530VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*before 10.0.17763.2061VulnerableMicrosoft
cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:*before 10.0.19042.1110VulnerableMicrosoft
  • cpe:2.3:o:microsoft:windows_server_2012:-:r2:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* Versions before 10.0.14393.4530 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* Versions before 10.0.17763.2061 Vulnerable ·Microsoft
  • cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:* Versions before 10.0.19042.1110 Vulnerable ·Microsoft

Remediation

Microsoft 7 updates

  • KB5004298
    Monthly Rollup
    • Windows 8.1 for 32-bit systems 6.3.9600.20069
    • Windows 8.1 for x64-based systems 6.3.9600.20069
    • Windows RT 8.1 6.3.9600.20069
    • Windows Server 2012 R2 6.3.9600.20069
    • Windows Server 2012 R2 (Server Core installation) 6.3.9600.20069
  • KB5004285
    Security Only
    • Windows 8.1 for 32-bit systems 6.3.9600.20069
    • Windows 8.1 for x64-based systems 6.3.9600.20069
    • Windows Server 2012 R2 6.3.9600.20069
    • Windows Server 2012 R2 (Server Core installation) 6.3.9600.20069
  • KB5004249
    Security Update
    • Windows 10 for 32-bit Systems 10.0.10240.19003
    • Windows 10 for x64-based Systems 10.0.10240.19003
Show 4 more Microsoft updates
  • KB5004245
    Security Update
    • Windows 10 Version 1909 for 32-bit Systems 10.0.18363.1679
    • Windows 10 Version 1909 for ARM64-based Systems 10.0.18363.1679
    • Windows 10 Version 1909 for x64-based Systems 10.0.18363.1679
    • Windows Server, version 1909 (Server Core installation) 10.0.18363.1679
  • KB5004244
    Security Update
    • Windows 10 Version 1809 for 32-bit Systems 10.0.17763.2061
    • Windows 10 Version 1809 for ARM64-based Systems 10.0.17763.2061
    • Windows 10 Version 1809 for x64-based Systems 10.0.17763.2061
    • Windows Server 2019 10.0.17763.2061
    • Windows Server 2019 (Server Core installation) 10.0.17763.2061
  • KB5004238
    Security Update
    • Windows 10 Version 1607 for 32-bit Systems 10.0.14393.4530
    • Windows 10 Version 1607 for x64-based Systems 10.0.14393.4530
    • Windows Server 2016 10.0.14393.4530
    • Windows Server 2016 (Server Core installation) 10.0.14393.4530
  • KB5004237
    Security Update
    • Windows 10 Version 2004 for 32-bit Systems 10.0.19041.1110
    • Windows 10 Version 2004 for ARM64-based Systems 10.0.19041.1110
    • Windows 10 Version 2004 for x64-based Systems 10.0.19041.1110
    • Windows 10 Version 20H2 for 32-bit Systems 10.0.19042.1110
    • Windows 10 Version 20H2 for ARM64-based Systems 10.0.19042.1110
    • Windows 10 Version 21H1 for 32-bit Systems 10.0.19043.1110
    • Windows 10 Version 21H1 for ARM64-based Systems 10.0.19043.1110
    • Windows 10 Version 21H1 for x64-based Systems 10.0.19043.1110
    • Windows Server, version 2004 (Server Core installation) 10.0.19041.1110
    • Windows Server, version 20H2 (Server Core Installation) 10.0.19042.1110

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Elevation of Privilege
Exploited
Yes
Publicly disclosed
No
Exploitability
Exploitation Detected

Timeline

  1. 2021-11-03 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2021-33771
  3. 2026-10-03 Alias added: GHSA-jv37-xg37-jxgp

References

Patch 2

  • TI-2017-06077 Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-24062 Windows SMB Client Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2025-24042 Internet Shortcut Files Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2024-32708 Windows Task Scheduler Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2024-29106 Windows MSHTML Platform Spoofing Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2024-19802 Windows MSHTML Platform Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
See all 1229 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences