Microsoft DWM Core Library Elevation of Privilege Vulnerability
Priority CRITICAL 96Exploited in the wildPublished · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- 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
Microsoft DWM Core Library Elevation of Privilege Vulnerability
Why it matters now
Exploitation Active In CISA KEV since 2021-11-03CISA due date 2021-11-17
EPSS 0.06609 93rd percentileScored 2026-11-07
Fix Fixed Windows 10 Version 1909 (Microsoft): 10.0.18363.1621Windows 10 Version 21H1 (Microsoft): 10.0.19043.1052+4 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 1909 | 10.0.0 to before 10.0.18363.1621 | 10.0.18363.1621 | Patch available | CNA |
| Microsoft | Windows 10 Version 21H1 | 10.0.0 to before 10.0.19043.1052 | 10.0.19043.1052 | Patch available | CNA |
| Microsoft | Windows 10 Version 2004 | 10.0.0 to before 10.0.19041.1052 | 10.0.19041.1052 | Patch available | CNA |
| Microsoft | Windows Server version 2004 | 10.0.0 to before 10.0.19041.1052 | 10.0.19041.1052 | Patch available | CNA |
| Microsoft | Windows 10 Version 20H2 | 10.0.0 to before 10.0.19042.1052 | 10.0.19042.1052 | Patch available | CNA |
| Microsoft | Windows Server version 20H2 | 10.0.0 to before 10.0.19042.1052 | 10.0.19042.1052 | Patch available | CNA |
- Windows 10 Version 1909 VendorMicrosoft Affected 10.0.0 to before 10.0.18363.1621 Fixed in 10.0.18363.1621 Patch available CNA
- Windows 10 Version 21H1 VendorMicrosoft Affected 10.0.0 to before 10.0.19043.1052 Fixed in 10.0.19043.1052 Patch available CNA
- Windows 10 Version 2004 VendorMicrosoft Affected 10.0.0 to before 10.0.19041.1052 Fixed in 10.0.19041.1052 Patch available CNA
- Windows Server version 2004 VendorMicrosoft Affected 10.0.0 to before 10.0.19041.1052 Fixed in 10.0.19041.1052 Patch available CNA
- Windows 10 Version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19042.1052 Fixed in 10.0.19042.1052 Patch available CNA
- Windows Server version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19042.1052 Fixed in 10.0.19042.1052 Patch available CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:* | before 10.0.18363.1621 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:* | before 10.0.19041.1052 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:* | before 10.0.19042.1052 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:* | before 10.0.19043.1052 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:* | before 10.0.19041.1052 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:* | before 10.0.19042.1052 | Vulnerable | Microsoft |
- cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:*:* Versions before 10.0.18363.1621 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10_2004:*:*:*:*:*:*:*:* Versions before 10.0.19041.1052 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10_20h2:*:*:*:*:*:*:*:* Versions before 10.0.19042.1052 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10_21h1:*:*:*:*:*:*:*:* Versions before 10.0.19043.1052 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:* Versions before 10.0.19041.1052 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:* Versions before 10.0.19042.1052 Vulnerable ·Microsoft
Remediation
- Fix · CNA Windows 10 Version 1909 (Microsoft) Fixed in 10.0.18363.1621
- Fix · CNA Windows 10 Version 21H1 (Microsoft) Fixed in 10.0.19043.1052
- Fix · CNA Windows 10 Version 2004 (Microsoft) Fixed in 10.0.19041.1052
- Fix · CNA Windows Server version 2004 (Microsoft) Fixed in 10.0.19041.1052
- Fix · CNA Windows 10 Version 20H2 (Microsoft) Fixed in 10.0.19042.1052
- Fix · CNA Windows Server version 20H2 (Microsoft) Fixed in 10.0.19042.1052
Timeline
- 2021-11-03 Added to CISA KEV
- 2026-10-02 Threatist record created from CVE-2021-33739
- 2026-10-03 Alias added: GHSA-4mwq-m8xw-34mr
More Microsoft Windows 10 1909 vulnerabilities
- TI-2020-00771 Memory corruption in Microsoft Windows 10 Version 1903 for 32-bit Systems KEVCVSS 3.1CRITICAL 10.0
- TI-2022-10154 Active Directory Domain Services Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2021-17496 Microsoft MSHTML Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2021-13480 Scripting Engine Memory Corruption Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2021-13116 Windows MSHTML Platform Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
- TI-2020-00989 Out-of-bounds write in Microsoft Windows KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2021-33739 · CVE Program
- CVE-2021-33739 · NVD
- CISA Known Exploited Vulnerabilities
- FIRST EPSS
- GHSA-4mwq-m8xw-34mr · 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