CVE-2026-83646
MEDIUMCVSS 5.4/10EPSS 0.42%
Last modified
CVE-2026-83646 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. Url redirection to untrusted site ('open redirect') in Active Directory Federation Services (AD FS) allows an authorized attacker to perform spoofing over a network.. EPSS estimates a 0.42% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 1607 | < 10.0.14393.9612 |
| Microsoft | Windows 10 1809 | < 10.0.17763.9376 |
| Microsoft | Windows Server 2016 | < 10.0.14393.9612 |
| Microsoft | Windows Server 2019 | < 10.0.17763.9376 |
| Microsoft | Windows Server 2022 | < 10.0.20348.5761 |
| Microsoft | Windows Server 2025 | < 10.0.26100.33650 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-83646?
Url redirection to untrusted site ('open redirect') in Active Directory Federation Services (AD FS) allows an authorized attacker to perform spoofing over a network.
How severe is CVE-2026-83646?
CVE-2026-83646 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.
How do I fix CVE-2026-83646?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
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Are you affected by CVE-2026-83646?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST