Windows DCOM Server Security Feature Bypass
Priority MEDIUM 60Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
Windows DCOM Server Security Feature Bypass
Why it matters now
EPSS 0.49844 98th percentileScored 2026-11-07
Fix Fixed Windows 10 Version 1809 (Microsoft): 10.0.17763.4131Windows Server 2019 (Microsoft): 10.0.17763.4131+23 more products
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Microsoft | Windows 10 Version 1809 | 10.0.0 to before 10.0.17763.4131 | 10.0.17763.4131 | Patch available | CNA |
| Microsoft | Windows Server 2019 | 10.0.0 to before 10.0.17763.4131 | 10.0.17763.4131 | Patch available | CNA |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.0 to before 10.0.17763.4131 | 10.0.17763.4131 | Patch available | CNA |
| Microsoft | Windows 10 Version 1909 | 10.0.0 to before 10.0.18363.2344 | 10.0.18363.2344 | Patch available | CNA |
| Microsoft | Windows 10 Version 21H1 | 10.0.0 to before 10.0.19043.1766 | 10.0.19043.1766 | Patch available | CNA |
| Microsoft | Windows Server 2022 | 10.0.0 to before 10.0.20348.1607 | 10.0.20348.1607 | Patch available | CNA |
| Microsoft | Windows 10 Version 20H2 | 10.0.0 to before 10.0.19042.2728 | 10.0.19042.2728 | Patch available | CNA |
| Microsoft | Windows 11 version 21H2 | 10.0.0 to before 10.0.22000.1696 | 10.0.22000.1696 | Patch available | CNA |
| Microsoft | Windows 10 Version 21H2 | 10.0.0 to before 10.0.19044.2728 | 10.0.19044.2728 | Patch available | CNA |
| Microsoft | Windows 10 Version 1507 | 10.0.0 to before 10.0.10240.19802 | 10.0.10240.19802 | Patch available | CNA |
| Microsoft | Windows 10 Version 1607 | 10.0.0 to before 10.0.14393.5786 | 10.0.14393.5786 | Patch available | CNA |
| Microsoft | Windows Server 2016 | 10.0.0 to before 10.0.14393.5786 | 10.0.14393.5786 | Patch available | CNA |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.0 to before 10.0.14393.5786 | 10.0.14393.5786 | Patch available | CNA |
| Microsoft | Windows 7 | 6.1.0 to before 6.1.7601.25984 | 6.1.7601.25984 | Patch available | CNA |
| Microsoft | Windows 7 Service Pack 1 | 6.1.0 to before 6.1.7601.25984 | 6.1.7601.25984 | Patch available | CNA |
| Microsoft | Windows 8.1 | 6.3.0 to before 6.3.9600.20402 | 6.3.9600.20402 | Patch available | CNA |
| Microsoft | Windows Server 2008 Service Pack 2 | 6.0.0 to before 6.0.6003.21966 | 6.0.6003.21966 | Patch available | CNA |
| Microsoft | Windows Server 2008 Service Pack 2 (Server Core installation) | 6.0.0 to before 6.0.6003.21966 | 6.0.6003.21966 | Patch available | CNA |
| Microsoft | Windows Server 2008 Service Pack 2 | 6.0.0 to before 6.0.6003.21966 | 6.0.6003.21966 | Patch available | CNA |
| Microsoft | Windows Server 2008 R2 Service Pack 1 | 6.1.0 to before 6.1.7601.26415 | 6.1.7601.26415 | Patch available | CNA |
| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) | 6.0.0 to before 6.1.7601.26415 | 6.1.7601.26415 | Patch available | CNA |
| Microsoft | Windows Server 2012 | 6.2.0 to before 6.2.9200.24168 | 6.2.9200.24168 | Patch available | CNA |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.0 to before 6.2.9200.24168 | 6.2.9200.24168 | Patch available | CNA |
| Microsoft | Windows Server 2012 R2 | 6.3.0 to before 6.3.9600.20865 | 6.3.9600.20865 | Patch available | CNA |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.0 to before 6.3.9600.20865 | 6.3.9600.20865 | Patch available | CNA |
- Windows 10 Version 1809 VendorMicrosoft Affected 10.0.0 to before 10.0.17763.4131 Fixed in 10.0.17763.4131 Patch available CNA
- Windows Server 2019 VendorMicrosoft Affected 10.0.0 to before 10.0.17763.4131 Fixed in 10.0.17763.4131 Patch available CNA
- Windows Server 2019 (Server Core installation) VendorMicrosoft Affected 10.0.0 to before 10.0.17763.4131 Fixed in 10.0.17763.4131 Patch available CNA
- Windows 10 Version 1909 VendorMicrosoft Affected 10.0.0 to before 10.0.18363.2344 Fixed in 10.0.18363.2344 Patch available CNA
- Windows 10 Version 21H1 VendorMicrosoft Affected 10.0.0 to before 10.0.19043.1766 Fixed in 10.0.19043.1766 Patch available CNA
- Windows Server 2022 VendorMicrosoft Affected 10.0.0 to before 10.0.20348.1607 Fixed in 10.0.20348.1607 Patch available CNA
- Windows 10 Version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19042.2728 Fixed in 10.0.19042.2728 Patch available CNA
- Windows 11 version 21H2 VendorMicrosoft Affected 10.0.0 to before 10.0.22000.1696 Fixed in 10.0.22000.1696 Patch available CNA
- Windows 10 Version 21H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19044.2728 Fixed in 10.0.19044.2728 Patch available CNA
- Windows 10 Version 1507 VendorMicrosoft Affected 10.0.0 to before 10.0.10240.19802 Fixed in 10.0.10240.19802 Patch available CNA
- Windows 10 Version 1607 VendorMicrosoft Affected 10.0.0 to before 10.0.14393.5786 Fixed in 10.0.14393.5786 Patch available CNA
- Windows Server 2016 VendorMicrosoft Affected 10.0.0 to before 10.0.14393.5786 Fixed in 10.0.14393.5786 Patch available CNA
- Windows Server 2016 (Server Core installation) VendorMicrosoft Affected 10.0.0 to before 10.0.14393.5786 Fixed in 10.0.14393.5786 Patch available CNA
- Windows 7 VendorMicrosoft Affected 6.1.0 to before 6.1.7601.25984 Fixed in 6.1.7601.25984 Patch available CNA
- Windows 7 Service Pack 1 VendorMicrosoft Affected 6.1.0 to before 6.1.7601.25984 Fixed in 6.1.7601.25984 Patch available CNA
- Windows 8.1 VendorMicrosoft Affected 6.3.0 to before 6.3.9600.20402 Fixed in 6.3.9600.20402 Patch available CNA
- Windows Server 2008 Service Pack 2 VendorMicrosoft Affected 6.0.0 to before 6.0.6003.21966 Fixed in 6.0.6003.21966 Patch available CNA
- Windows Server 2008 Service Pack 2 (Server Core installation) VendorMicrosoft Affected 6.0.0 to before 6.0.6003.21966 Fixed in 6.0.6003.21966 Patch available CNA
- Windows Server 2008 Service Pack 2 VendorMicrosoft Affected 6.0.0 to before 6.0.6003.21966 Fixed in 6.0.6003.21966 Patch available CNA
- Windows Server 2008 R2 Service Pack 1 VendorMicrosoft Affected 6.1.0 to before 6.1.7601.26415 Fixed in 6.1.7601.26415 Patch available CNA
- Windows Server 2008 R2 Service Pack 1 (Server Core installation) VendorMicrosoft Affected 6.0.0 to before 6.1.7601.26415 Fixed in 6.1.7601.26415 Patch available CNA
- Windows Server 2012 VendorMicrosoft Affected 6.2.0 to before 6.2.9200.24168 Fixed in 6.2.9200.24168 Patch available CNA
- Windows Server 2012 (Server Core installation) VendorMicrosoft Affected 6.2.0 to before 6.2.9200.24168 Fixed in 6.2.9200.24168 Patch available CNA
- Windows Server 2012 R2 VendorMicrosoft Affected 6.3.0 to before 6.3.9600.20865 Fixed in 6.3.9600.20865 Patch available CNA
- Windows Server 2012 R2 (Server Core installation) VendorMicrosoft Affected 6.3.0 to before 6.3.9600.20865 Fixed in 6.3.9600.20865 Patch available CNA
CPE configurations NVD · 36
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:x64:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:x86:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:arm64:* | 20h2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:x64:* | 20h2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:x86:* | 20h2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:arm64:* | 21h1 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:x64:* | 21h1 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:x86:* | 21h1 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:21h2:*:*:*:*:*:arm64:* | 21h2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:21h2:*:*:*:*:*:x64:* | 21h2 | Vulnerable | Microsoft |
- cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:x64:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:x86:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:arm64:* Versions 20h2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:x64:* Versions 20h2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:20h2:*:*:*:*:*:x86:* Versions 20h2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:arm64:* Versions 21h1 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:x64:* Versions 21h1 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:21h1:*:*:*:*:*:x86:* Versions 21h1 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:21h2:*:*:*:*:*:arm64:* Versions 21h2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:21h2:*:*:*:*:*:x64:* Versions 21h2 Vulnerable ·Microsoft
Show 26 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microsoft:windows_10:21h2:*:*:*:*:*:x86:* | 21h2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:arm64:* | 1809 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:x64:* | 1809 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:x86:* | 1809 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:arm64:* | 1909 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:x64:* | 1909 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:x86:* | 1909 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:arm64:* | 2004 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:x64:* | 2004 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:x86:* | 2004 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:x64:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:x86:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server:20h2:*:*:*:*:*:*:* | 20h2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server:2004:*:*:*:*:*:*:* | 2004 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:* | r2 sp1 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x86:* | r2 sp1 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* | r2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* | all versions | Vulnerable | Microsoft |
- cpe:2.3:o:microsoft:windows_10:21h2:*:*:*:*:*:x86:* Versions 21h2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:arm64:* Versions 1809 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:x64:* Versions 1809 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:1809:*:*:*:*:*:x86:* Versions 1809 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:arm64:* Versions 1909 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:x64:* Versions 1909 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:x86:* Versions 1909 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:arm64:* Versions 2004 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:x64:* Versions 2004 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_10:2004:*:*:*:*:*:x86:* Versions 2004 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:x64:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:x86:* Versions not specified by NVD 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:20h2:*:*:*:*:*:*:* Versions 20h2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server:2004:*:*:*:*:*:*:* Versions 2004 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x64:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:x86:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:* Versions r2 sp1 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x86:* Versions r2 sp1 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* Versions r2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
Remediation
- Fix · CNA Windows 10 Version 1809 (Microsoft) Fixed in 10.0.17763.4131
- Fix · CNA Windows Server 2019 (Microsoft) Fixed in 10.0.17763.4131
- Fix · CNA Windows Server 2019 (Server Core installation) (Microsoft) Fixed in 10.0.17763.4131
- Fix · CNA Windows 10 Version 1909 (Microsoft) Fixed in 10.0.18363.2344
- Fix · CNA Windows 10 Version 21H1 (Microsoft) Fixed in 10.0.19043.1766
- Fix · CNA Windows Server 2022 (Microsoft) Fixed in 10.0.20348.1607
- Fix · CNA Windows 10 Version 20H2 (Microsoft) Fixed in 10.0.19042.2728
- Fix · CNA Windows 11 version 21H2 (Microsoft) Fixed in 10.0.22000.1696
- Fix · CNA Windows 10 Version 21H2 (Microsoft) Fixed in 10.0.19044.2728
- Fix · CNA Windows 10 Version 1507 (Microsoft) Fixed in 10.0.10240.19802
- Fix · CNA Windows 10 Version 1607 (Microsoft) Fixed in 10.0.14393.5786
- Fix · CNA Windows Server 2016 (Microsoft) Fixed in 10.0.14393.5786
- Fix · CNA Windows Server 2016 (Server Core installation) (Microsoft) Fixed in 10.0.14393.5786
- Fix · CNA Windows 7 (Microsoft) Fixed in 6.1.7601.25984
- Fix · CNA Windows 7 Service Pack 1 (Microsoft) Fixed in 6.1.7601.25984
- Fix · CNA Windows 8.1 (Microsoft) Fixed in 6.3.9600.20402
- Fix · CNA Windows Server 2008 Service Pack 2 (Microsoft) Fixed in 6.0.6003.21966
- Fix · CNA Windows Server 2008 Service Pack 2 (Server Core installation) (Microsoft) Fixed in 6.0.6003.21966
- Fix · CNA Windows Server 2008 Service Pack 2 (Microsoft) Fixed in 6.0.6003.21966
- Fix · CNA Windows Server 2008 R2 Service Pack 1 (Microsoft) Fixed in 6.1.7601.26415
- Fix · CNA Windows Server 2008 R2 Service Pack 1 (Server Core installation) (Microsoft) Fixed in 6.1.7601.26415
- Fix · CNA Windows Server 2012 (Microsoft) Fixed in 6.2.9200.24168
- Fix · CNA Windows Server 2012 (Server Core installation) (Microsoft) Fixed in 6.2.9200.24168
- Fix · CNA Windows Server 2012 R2 (Microsoft) Fixed in 6.3.9600.20865
- Fix · CNA Windows Server 2012 R2 (Server Core installation) (Microsoft) Fixed in 6.3.9600.20865
Timeline
- 2026-10-02 Threatist record created from CVE-2021-26414
- 2026-10-03 Alias added: GHSA-3r2g-rwx7-4qwp
References
More Microsoft Windows 10 vulnerabilities
- TI-2015-02132 Buffer underflow in atmfd.dll in the Windows Adobe Type Manager Library in Microsoft… KEVCVSS 3.1HIGH 8.8
- TI-2022-10056 Remote Procedure Call Runtime Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
- TI-2022-06273 HTTP Protocol Stack Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
- TI-2019-00906 Remote Desktop Services Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
- TI-2022-15533 Windows Internet Key Exchange (IKE) Protocol Extensions Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
- TI-2015-01587 Mount Manager in Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows… KEVCVSS 3.1MEDIUM 6.6
Sources
- CVE-2021-26414 · CVE Program
- CVE-2021-26414 · NVD
- FIRST EPSS
- GHSA-3r2g-rwx7-4qwp · 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