Windows LSA Spoofing Vulnerability
Priority CRITICAL 92Exploited in the wildPublished · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Microsoft. Impact type from Microsoft.
Summary
Windows LSA Spoofing Vulnerability
Why it matters now
Exploitation Active In CISA KEV since 2021-11-03CISA due date 2021-11-17Known ransomware use
EPSS 0.66023 99th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Microsoft: 11 updates
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Active
- Automatable
- Yes
- 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 Server 2008 R2 Service Pack 1 | 6.1.7601.0 to before 6.1.7601.25685 | 6.1.7601.25685 | Patch available | CNA |
| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) | 6.1.7601.0 to before 6.1.7601.25685 | 6.1.7601.25685 | Patch available | CNA |
| Microsoft | Windows Server 2008 Service Pack 2 | 6.0.6003.0 to before 6.0.6003.21192 | 6.0.6003.21192 | Patch available | CNA |
| Microsoft | Windows Server 2008 Service Pack 2 (Server Core installation) | 6.0.6003.0 to before 6.0.6003.21192 | 6.0.6003.21192 | Patch available | CNA |
| Microsoft | Windows Server 2012 | 6.2.9200.0 to before 6.2.9200.23435 | 6.2.9200.23435 | Patch available | CNA |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 to before 6.2.9200.23435 | 6.2.9200.23435 | Patch available | CNA |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 to before 6.3.9600.20094 | 6.3.9600.20094 | Patch available | CNA |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 to before 6.3.9600.20094 | 6.3.9600.20094 | Patch available | CNA |
| Microsoft | Windows Server 2016 | 10.0.14393.0 to before 10.0.14393.4583 | 10.0.14393.4583 | Patch available | CNA |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 to before 10.0.14393.4583 | 10.0.14393.4583 | Patch available | CNA |
| Microsoft | Windows Server 2019 | 10.0.17763.0 to before 10.0.17763.2114 | 10.0.17763.2114 | Patch available | CNA |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 to before 10.0.17763.2114 | 10.0.17763.2114 | Patch available | CNA |
| Microsoft | Windows Server version 2004 | 10.0.0 to before 10.0.19041.1165 | 10.0.19041.1165 | Patch available | CNA |
| Microsoft | Windows Server version 20H2 | 10.0.0 to before 10.0.19042.1165 | 10.0.19042.1165 | Patch available | CNA |
- Windows Server 2008 R2 Service Pack 1 VendorMicrosoft Affected 6.1.7601.0 to before 6.1.7601.25685 Fixed in 6.1.7601.25685 Patch available CNA
- Windows Server 2008 R2 Service Pack 1 (Server Core installation) VendorMicrosoft Affected 6.1.7601.0 to before 6.1.7601.25685 Fixed in 6.1.7601.25685 Patch available CNA
- Windows Server 2008 Service Pack 2 VendorMicrosoft Affected 6.0.6003.0 to before 6.0.6003.21192 Fixed in 6.0.6003.21192 Patch available CNA
- Windows Server 2008 Service Pack 2 (Server Core installation) VendorMicrosoft Affected 6.0.6003.0 to before 6.0.6003.21192 Fixed in 6.0.6003.21192 Patch available CNA
- Windows Server 2012 VendorMicrosoft Affected 6.2.9200.0 to before 6.2.9200.23435 Fixed in 6.2.9200.23435 Patch available CNA
- Windows Server 2012 (Server Core installation) VendorMicrosoft Affected 6.2.9200.0 to before 6.2.9200.23435 Fixed in 6.2.9200.23435 Patch available CNA
- Windows Server 2012 R2 VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.20094 Fixed in 6.3.9600.20094 Patch available CNA
- Windows Server 2012 R2 (Server Core installation) VendorMicrosoft Affected 6.3.9600.0 to before 6.3.9600.20094 Fixed in 6.3.9600.20094 Patch available CNA
- Windows Server 2016 VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.4583 Fixed in 10.0.14393.4583 Patch available CNA
- Windows Server 2016 (Server Core installation) VendorMicrosoft Affected 10.0.14393.0 to before 10.0.14393.4583 Fixed in 10.0.14393.4583 Patch available CNA
- Windows Server 2019 VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.2114 Fixed in 10.0.17763.2114 Patch available CNA
- Windows Server 2019 (Server Core installation) VendorMicrosoft Affected 10.0.17763.0 to before 10.0.17763.2114 Fixed in 10.0.17763.2114 Patch available CNA
- Windows Server version 2004 VendorMicrosoft Affected 10.0.0 to before 10.0.19041.1165 Fixed in 10.0.19041.1165 Patch available CNA
- Windows Server version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19042.1165 Fixed in 10.0.19042.1165 Patch available CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:* | before 10.0.19041.1165 | 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:r2:sp1:*:*:*:*:x64:* | 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:*:*:*:*:*:*:*:* | before 10.0.14393.4583 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* | before 10.0.17763.2114 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:* | before 10.0.19042.1165 | Vulnerable | Microsoft |
- cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:* Versions before 10.0.19041.1165 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:r2:sp1:*:*:*:*:x64:* 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 before 10.0.14393.4583 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* Versions before 10.0.17763.2114 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_20h2:*:*:*:*:*:*:*:* Versions before 10.0.19042.1165 Vulnerable ·Microsoft
Remediation
Microsoft 11 updates
- Security Only
- Windows 8.1 for 32-bit systems 6.3.9600.20094
- Windows 8.1 for x64-based systems 6.3.9600.20094
- Windows Server 2012 R2 6.3.9600.20094
- Windows Server 2012 R2 (Server Core installation) 6.3.9600.20094
- Monthly Rollup
- Windows Server 2012 6.2.9200.23435
- Windows Server 2012 (Server Core installation) 6.2.9200.23435
- Security Only
- Windows Server 2008 for 32-bit Systems Service Pack 2 6.0.6003.21192
- Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 6.0.6003.21192
- Windows Server 2008 for x64-based Systems Service Pack 2 6.0.6003.21192
- Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 6.0.6003.21192
Show 8 more Microsoft updates
- Security Only
- Windows Server 2012 6.2.9200.23435
- Windows Server 2012 (Server Core installation) 6.2.9200.23435
- Monthly Rollup
- Windows Server 2008 for 32-bit Systems Service Pack 2 6.0.6003.21192
- Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) 6.0.6003.21192
- Windows Server 2008 for x64-based Systems Service Pack 2 6.0.6003.21192
- Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) 6.0.6003.21192
- Security Only
- Windows 7 for 32-bit Systems Service Pack 1 6.1.7601.25685
- Windows 7 for x64-based Systems Service Pack 1 6.1.7601.25685
- Windows Server 2008 R2 for x64-based Systems Service Pack 1 6.1.7601.25685
- Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 6.1.7601.25685
- Monthly Rollup
- Windows 7 for 32-bit Systems Service Pack 1 6.1.7601.25685
- Windows 7 for x64-based Systems Service Pack 1 6.1.7601.25685
- Windows Server 2008 R2 for x64-based Systems Service Pack 1 6.1.7601.25685
- Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 6.1.7601.25685
- Monthly Rollup
- Windows 8.1 for 32-bit systems 6.3.9600.20094
- Windows 8.1 for x64-based systems 6.3.9600.20094
- Windows RT 8.1 6.3.9600.20094
- Windows Server 2012 R2 6.3.9600.20094
- Windows Server 2012 R2 (Server Core installation) 6.3.9600.20094
- Security Update
- Windows 10 Version 1607 for 32-bit Systems 10.0.14393.4583
- Windows 10 Version 1607 for x64-based Systems 10.0.14393.4583
- Windows Server 2016 10.0.14393.4583
- Windows Server 2016 (Server Core installation) 10.0.14393.4583
- Security Update
- Windows 10 Version 2004 for 32-bit Systems 10.0.19041.1165
- Windows 10 Version 2004 for ARM64-based Systems 10.0.19041.1165
- Windows 10 Version 2004 for x64-based Systems 10.0.19041.1165
- Windows 10 Version 20H2 for 32-bit Systems 10.0.19042.1165
- Windows 10 Version 20H2 for ARM64-based Systems 10.0.19042.1165
- Windows 10 Version 21H1 for 32-bit Systems 10.0.19043.1165
- Windows 10 Version 21H1 for ARM64-based Systems 10.0.19043.1165
- Windows 10 Version 21H1 for x64-based Systems 10.0.19043.1165
- Windows Server, version 2004 (Server Core installation) 10.0.19041.1165
- Windows Server, version 20H2 (Server Core Installation) 10.0.19042.1165
- Security Update
- Windows 10 Version 1809 for 32-bit Systems 10.0.17763.2114
- Windows 10 Version 1809 for ARM64-based Systems 10.0.17763.2114
- Windows 10 Version 1809 for x64-based Systems 10.0.17763.2114
- Windows Server 2019 10.0.17763.2114
- Windows Server 2019 (Server Core installation) 10.0.17763.2114
Vendor assessments
Microsoft
Microsoft's page for this CVE →
- Impact
- Spoofing
- Exploited
- No
- Publicly disclosed
- Yes
- Exploitability
- Exploitation More Likely
Timeline
- 2021-11-03 Added to CISA KEV
- 2026-10-02 Threatist record created from CVE-2021-36942
- 2026-10-03 Alias added: GHSA-p8qf-gcxq-47xm
References
More Microsoft Windows Server 2004 vulnerabilities
- TI-2021-11386 HTTP Protocol Stack Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2020-01431 Netlogon Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 10.0
- TI-2021-18722 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-2021-13113 Microsoft DWM Core Library Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.4
- TI-2021-19234 Windows Common Log File System Driver Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 7.8
Sources
- CVE-2021-36942 · CVE Program
- CVE-2021-36942 · NVD
- CISA Known Exploited Vulnerabilities
- FIRST EPSS
- GHSA-p8qf-gcxq-47xm · GitHub Advisory Database · CC BY 4.0
- CVE-2021-36942 · Microsoft Security Update Guide
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences