high8.1
CVE-2026-83674
Weak authentication in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.
Impact
Weak authentication in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Windows 10 Version 1809 | from 10.0.17763.0 before 10.0.17763.9376 |
| Microsoft | Windows 10 Version 1607 | from 10.0.14393.0 before 10.0.14393.9612 |
| Microsoft | Windows Server 2022 | from 10.0.20348.0 before 10.0.20348.5761 |
| Microsoft | Windows Server 2016 | from 10.0.14393.0 before 10.0.14393.9612 |
| Microsoft | Windows Server 2019 | from 10.0.17763.0 before 10.0.17763.9376 |
| Microsoft | Windows Server 2016 (Server Core Installation) | from 10.0.14393.0 before 10.0.14393.9612 |
| Microsoft | Windows Server 2019 (Server Core Installation) | from 10.0.17763.0 before 10.0.17763.9376 |
| Microsoft | Windows Server 2025 (Server Core Installation) | from 10.0.26100.0 before 10.0.26100.33650 |
| Microsoft | Windows Server 2025 | from 10.0.26100.0 before 10.0.26100.33650 |
| Microsoft | Windows 10 1607 | before 10.0.14393.9612 |
| Microsoft | Windows 10 1809 | before 10.0.17763.9376 |
| Microsoft | Windows Server 2016 | before 10.0.14393.9612 |
| Microsoft | Windows Server 2019 | before 10.0.17763.9376 |
| Microsoft | Windows Server 2022 | before 10.0.20348.5761 |
| Microsoft | Windows Server 2025 | before 10.0.26100.33650 |