CVE-2021-33779

Windows AD FS Security Feature Bypass Vulnerability

Description

Windows AD FS Security Feature Bypass Vulnerability

8.1

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 1.08% Top 25%

Vendor Advisory microsoft.com

Affected: Microsoft Windows Server 2019

Affected: Microsoft Windows Server 2019 (Server Core installation)

Affected: Microsoft Windows Server version 2004

Affected: Microsoft Windows Server version 20H2

Affected: Microsoft Windows Server 2016

Affected: Microsoft Windows Server 2016 (Server Core installation)

References

Link	Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33779	patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-33779?: CVE-2021-33779 has been scored as a high severity vulnerability.
How to fix CVE-2021-33779?: To fix CVE-2021-33779, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-33779 being actively exploited in the wild?: It is possible that CVE-2021-33779 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-33779?: CVE-2021-33779 affects Microsoft Windows Server 2019, Microsoft Windows Server 2019 (Server Core installation), Microsoft Windows Server version 2004, Microsoft Windows Server version 20H2, Microsoft Windows Server 2016, Microsoft Windows Server 2016 (Server Core installation).

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