Win32k 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
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
Win32k Elevation of Privilege Vulnerability
Why it matters now
Exploitation Active In CISA KEV since 2022-04-25CISA due date 2022-05-16
EPSS 0.01582 75th percentileScored 2026-11-07
Fix Fixed Windows 10 Version 1809 (Microsoft): 10.0.17763.2237Windows Server 2019 (Microsoft): 10.0.17763.2237+9 more products
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | Windows 10 Version 1809 | 10.0.0 to before 10.0.17763.2237 | 10.0.17763.2237 | Patch available | CNA |
| Microsoft | Windows Server 2019 | 10.0.0 to before 10.0.17763.2237 | 10.0.17763.2237 | Patch available | CNA |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.0 to before 10.0.17763.2237 | 10.0.17763.2237 | Patch available | CNA |
| Microsoft | Windows 10 Version 1909 | 10.0.0 to before 10.0.18363.1854 | 10.0.18363.1854 | Patch available | CNA |
| Microsoft | Windows 10 Version 21H1 | 10.0.0 to before 10.0.19043.1288 | 10.0.19043.1288 | Patch available | CNA |
| Microsoft | Windows Server 2022 | 10.0.0 to before 10.0.20348.288 | 10.0.20348.288 | Patch available | CNA |
| Microsoft | Windows 10 Version 2004 | 10.0.0 to before 10.0.19041.1288 | 10.0.19041.1288 | Patch available | CNA |
| Microsoft | Windows Server version 2004 | 10.0.0 to before 10.0.19041.1288 | 10.0.19041.1288 | Patch available | CNA |
| Microsoft | Windows 10 Version 20H2 | 10.0.0 to before 10.0.19042.1288 | 10.0.19042.1288 | Patch available | CNA |
| Microsoft | Windows Server version 20H2 | 10.0.0 to before 10.0.19042.1288 | 10.0.19042.1288 | Patch available | CNA |
| Microsoft | Windows 11 version 21H2 | 10.0.0 to before 10.0.22000.258 | 10.0.22000.258 | Patch available | CNA |
- Windows 10 Version 1809 VendorMicrosoft Affected 10.0.0 to before 10.0.17763.2237 Fixed in 10.0.17763.2237 Patch available CNA
- Windows Server 2019 VendorMicrosoft Affected 10.0.0 to before 10.0.17763.2237 Fixed in 10.0.17763.2237 Patch available CNA
- Windows Server 2019 (Server Core installation) VendorMicrosoft Affected 10.0.0 to before 10.0.17763.2237 Fixed in 10.0.17763.2237 Patch available CNA
- Windows 10 Version 1909 VendorMicrosoft Affected 10.0.0 to before 10.0.18363.1854 Fixed in 10.0.18363.1854 Patch available CNA
- Windows 10 Version 21H1 VendorMicrosoft Affected 10.0.0 to before 10.0.19043.1288 Fixed in 10.0.19043.1288 Patch available CNA
- Windows Server 2022 VendorMicrosoft Affected 10.0.0 to before 10.0.20348.288 Fixed in 10.0.20348.288 Patch available CNA
- Windows 10 Version 2004 VendorMicrosoft Affected 10.0.0 to before 10.0.19041.1288 Fixed in 10.0.19041.1288 Patch available CNA
- Windows Server version 2004 VendorMicrosoft Affected 10.0.0 to before 10.0.19041.1288 Fixed in 10.0.19041.1288 Patch available CNA
- Windows 10 Version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19042.1288 Fixed in 10.0.19042.1288 Patch available CNA
- Windows Server version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19042.1288 Fixed in 10.0.19042.1288 Patch available CNA
- Windows 11 version 21H2 VendorMicrosoft Affected 10.0.0 to before 10.0.22000.258 Fixed in 10.0.22000.258 Patch available CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:* | before 10.0.17763.2237 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:* | before 10.0.18363.1854 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:* | before 10.0.19041.1288 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:* | before 10.0.19042.1288 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:* | before 10.0.19043.1288 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:* | before 10.0.22000.258 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:* | before 10.0.19041.1288 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* | before 10.0.17763.2237 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* | before 10.0.20348.288 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:* | before 10.0.19042.1288 | Vulnerable | Microsoft |
- cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:*:* Versions before 10.0.17763.2237 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:* Versions before 10.0.18363.1854 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:* Versions before 10.0.19041.1288 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:* Versions before 10.0.19042.1288 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:* Versions before 10.0.19043.1288 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_11_21h2:*:*:*:*:*:*:*:* Versions before 10.0.22000.258 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:* Versions before 10.0.19041.1288 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* Versions before 10.0.17763.2237 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* Versions before 10.0.20348.288 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:* Versions before 10.0.19042.1288 Vulnerable ·Microsoft
Remediation
- Fix · CNA Windows 10 Version 1809 (Microsoft) Fixed in 10.0.17763.2237
- Fix · CNA Windows Server 2019 (Microsoft) Fixed in 10.0.17763.2237
- Fix · CNA Windows Server 2019 (Server Core installation) (Microsoft) Fixed in 10.0.17763.2237
- Fix · CNA Windows 10 Version 1909 (Microsoft) Fixed in 10.0.18363.1854
- Fix · CNA Windows 10 Version 21H1 (Microsoft) Fixed in 10.0.19043.1288
- Fix · CNA Windows Server 2022 (Microsoft) Fixed in 10.0.20348.288
- Fix · CNA Windows 10 Version 2004 (Microsoft) Fixed in 10.0.19041.1288
- Fix · CNA Windows Server version 2004 (Microsoft) Fixed in 10.0.19041.1288
- Fix · CNA Windows 10 Version 20H2 (Microsoft) Fixed in 10.0.19042.1288
- Fix · CNA Windows Server version 20H2 (Microsoft) Fixed in 10.0.19042.1288
- Fix · CNA Windows 11 version 21H2 (Microsoft) Fixed in 10.0.22000.258
Timeline
- 2022-04-25 Added to CISA KEV
- 2026-10-02 Threatist record created from CVE-2021-40450
- 2026-10-03 Alias added: GHSA-v7qc-rhmv-f6j4
More Microsoft Windows 10 1809 vulnerabilities
- TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2026-73128 Windows Shell Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2026-17367 MSHTML Framework Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2026-17364 Windows Shell Security Feature Bypass Vulnerability KEVCVSS 3.1HIGH 8.8
- 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
Sources
- CVE-2021-40450 · CVE Program
- CVE-2021-40450 · NVD
- CISA Known Exploited Vulnerabilities
- FIRST EPSS
- GHSA-v7qc-rhmv-f6j4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences