Active Directory Federation Server Spoofing Vulnerability
Priority LOW 26Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
Active Directory Federation Server Spoofing Vulnerability
Why it matters now
EPSS 0.0095 61st percentileScored 2026-11-07
Fix Fixed Windows Server 2019 (Microsoft): 10.0.17763.2237Windows Server 2019 (Server Core installation) (Microsoft): 10.0.17763.2237+5 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 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 Server 2022 | 10.0.0 to before 10.0.20348.288 | 10.0.20348.288 | 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 Server version 20H2 | 10.0.0 to before 10.0.19041.1288 | 10.0.19041.1288 | Patch available | CNA |
| Microsoft | Windows Server 2016 | 10.0.0 to before 10.0.14393.4704 | 10.0.14393.4704 | Patch available | CNA |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.0 to before 10.0.14393.4704 | 10.0.14393.4704 | 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 Server 2022 VendorMicrosoft Affected 10.0.0 to before 10.0.20348.288 Fixed in 10.0.20348.288 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 Server version 20H2 VendorMicrosoft Affected 10.0.0 to before 10.0.19041.1288 Fixed in 10.0.19041.1288 Patch available CNA
- Windows Server 2016 VendorMicrosoft Affected 10.0.0 to before 10.0.14393.4704 Fixed in 10.0.14393.4704 Patch available CNA
- Windows Server 2016 (Server Core installation) VendorMicrosoft Affected 10.0.0 to before 10.0.14393.4704 Fixed in 10.0.14393.4704 Patch available CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:* | 20h2 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:* | 2004 | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
| cpe:2.3:o:microsoft:windows_server_2022:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Microsoft |
- cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:* Versions 20h2 Vulnerable ·Microsoft
- cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:* Versions 2004 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 not specified by NVD Vulnerable ·Microsoft
Remediation
- 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 Server 2022 (Microsoft) Fixed in 10.0.20348.288
- Fix · CNA Windows Server version 2004 (Microsoft) Fixed in 10.0.19041.1288
- Fix · CNA Windows Server version 20H2 (Microsoft) Fixed in 10.0.19041.1288
- Fix · CNA Windows Server 2016 (Microsoft) Fixed in 10.0.14393.4704
- Fix · CNA Windows Server 2016 (Server Core installation) (Microsoft) Fixed in 10.0.14393.4704
Timeline
- 2026-10-02 Threatist record created from CVE-2021-41361
- 2026-10-03 Alias added: GHSA-w5wj-j6jx-xf6h
More Microsoft Windows Server 2016 vulnerabilities
- TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2025-36863 Windows Server Update Service (WSUS) Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2020-01431 Netlogon Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 10.0
- TI-2020-01310 Improper input validation in Microsoft Windows Server KEVCVSS 3.1CRITICAL 10.0
- TI-2017-06077 Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista… KEVCVSS 3.1CRITICAL 9.8
- TI-2020-01009 Improper input validation in Microsoft Windows Server KEVCVSS 3.1CRITICAL 9.0
Sources
- CVE-2021-41361 · CVE Program
- CVE-2021-41361 · NVD
- FIRST EPSS
- GHSA-w5wj-j6jx-xf6h · 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