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CVE-2026-103576

Active Directory Federation Services (AD FS) Spoofing Vulnerability

At a glance

Severity
MEDIUM 6.5
EPSS
EPSS 0.88 % · percentile 59 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
microsoft
NVD status
Analyzed

Description

Url redirection to untrusted site ('open redirect') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:Cmicrosoft
CVSS 3.1MEDIUM 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:NNVD · secure@microsoft.com (Secondary)

Weaknesses (CWE)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Microsoft · Windows 10 Version 1607affected 10.0.14393.0 < 10.0.14393.9612
Microsoft · Windows 10 Version 1809affected 10.0.17763.0 < 10.0.17763.9376
Microsoft · Windows Server 2016affected 10.0.14393.0 < 10.0.14393.9612
Microsoft · Windows Server 2016 (Server Core installation)affected 10.0.14393.0 < 10.0.14393.9612
Microsoft · Windows Server 2019affected 10.0.17763.0 < 10.0.17763.9376
Microsoft · Windows Server 2019 (Server Core installation)affected 10.0.17763.0 < 10.0.17763.9376
Microsoft · Windows Server 2022affected 10.0.20348.0 < 10.0.20348.5761
Microsoft · Windows Server 2025affected 10.0.26100.0 < 10.0.26100.33650
Microsoft · Windows Server 2025 (Server Core installation)affected 10.0.26100.0 < 10.0.26100.33650

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD