CVE-2021-40456 Windows AD FS Security Feature Bypass Vulnerability
Attackers can bypass security features in Windows AD FS, potentially compromising authentication integrity on affected Windows Server installations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-40456?
CVE-2021-40456 is a medium-severity vulnerability in Microsoft Windows Server, published on 13 Oct 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Windows AD FS Security Feature Bypass Vulnerability
Weakness: CWE-863
Which versions are affected by CVE-2021-40456?
It affects 3 products.
Products include Microsoft Windows Server, Microsoft Windows Server 2019, Microsoft Windows Server 2022.
How do I fix CVE-2021-40456?
No fix has been published for CVE-2021-40456 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-40456 being exploited?
There is no known exploitation of CVE-2021-40456 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows Server
- CVE-2022-26937 Windows Network File System Remote Code Execution Vulnerability
- CVE-2022-26932 Storage Spaces Direct Elevation of Privilege Vulnerability
- CVE-2022-21884 Local Security Authority Subsystem Service Elevation of Privilege Vulnerability
- CVE-2022-21910 Microsoft Cluster Port Driver Elevation of Privilege Vulnerability
- CVE-2021-42282 Active Directory Domain Services Elevation of Privilege Vulnerability
Sources
Also known as GHSA-j5xg-6v4g-89vw.