CVE-2026-83646
Medium
Description
Url redirection to untrusted site ('open redirect') in Active Directory Federation Services (AD FS) allows an authorized attacker to perform spoofing over a network.
SeverityMedium
CVSS4.8
Exploit probability—
Product
Microsoft Windows
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-601Open redirect
How to fix
Update
- microsoft windows_10_160710.0.14393.9612 or later
- microsoft windows_10_180910.0.17763.9376 or later
- microsoft windows_server_201610.0.14393.9612 or later
- microsoft windows_server_201910.0.17763.9376 or later
- microsoft windows_server_202210.0.20348.5761 or later
- microsoft windows_server_202510.0.26100.33650 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_10_1607 | v < 10.0.14393.9612 | 10.0.14393.9612 |
| microsoft windows_10_1809 | v < 10.0.17763.9376 | 10.0.17763.9376 |
| microsoft windows_server_2016 | v < 10.0.14393.9612 | 10.0.14393.9612 |
| microsoft windows_server_2019 | v < 10.0.17763.9376 | 10.0.17763.9376 |
| microsoft windows_server_2022 | v < 10.0.20348.5761 | 10.0.20348.5761 |
| microsoft windows_server_2025 | v < 10.0.26100.33650 | 10.0.26100.33650 |
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