Description
Weak authentication in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 – < 10.0.14393.9612 | 10.0.14393.9612 |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 – < 10.0.17763.9376 | 10.0.17763.9376 |
| Microsoft | Windows Server 2016 | 10.0.14393.0 – < 10.0.14393.9612 | 10.0.14393.9612 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 – < 10.0.14393.9612 | 10.0.14393.9612 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – < 10.0.17763.9376 | 10.0.17763.9376 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – < 10.0.17763.9376 | 10.0.17763.9376 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – < 10.0.20348.5761 | 10.0.20348.5761 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – < 10.0.26100.33650 | 10.0.26100.33650 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – < 10.0.26100.33650 | 10.0.26100.33650 |
Advisories 2
- WID-SEC-2026-3892 Microsoft Windows und Windows Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 8, 2026
- MSRC-CVE-2026-83674 Active Directory Federation Services (AD FS) Spoofing Vulnerability Microsoft Security Response Center · Oct 13, 2026
References
- Active Directory Federation Services (AD FS) Spoofing Vulnerability vendor-advisory patch