CVE-2021-40456

MediumCVSS 5.3/10Last modified Jun 17, 2026

Description

Windows AD FS Security Feature Bypass Vulnerability

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-863

Affected software

VendorProductVersions
MicrosoftWindows Server 2019>= 10.0.0, < 10.0.17763.2237
MicrosoftWindows Server 2019 (Server Core installation)>= 10.0.0, < 10.0.17763.2237
MicrosoftWindows Server 2022>= 10.0.0, < 10.0.20348.288
MicrosoftWindows Server version 2004>= 10.0.0, < 10.0.19041.1288
MicrosoftWindows Server version 20H2>= 10.0.0, < 10.0.19042.1288

References

Timeline

Published
Oct 13, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2021-40456: Medium severity, CVSS 5.3 | Vulnix