CVE-2021-43217 Windows Encrypting File System (EFS) Remote Code Execution Vulnerability
An attacker can execute arbitrary code on Windows systems via the Encrypting File System, requiring immediate patching by system administrators.
- 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-2021-43217?
CVE-2021-43217 is a high-severity code injection vulnerability in Microsoft Windows 10, published on 15 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Windows Encrypting File System (EFS) Remote Code Execution Vulnerability
Which versions are affected by CVE-2021-43217?
It affects 10 products.
Products include Microsoft Windows 10, Microsoft Windows 11, Microsoft Windows 7, Microsoft Windows 8.1, Microsoft Windows Rt 8.1, Microsoft Windows Server and 4 more.
How do I fix CVE-2021-43217?
No fix has been published for CVE-2021-43217 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2021-43217 being exploited?
There is no known exploitation of CVE-2021-43217 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Microsoft Windows 10
- CVE-2015-2426 Microsoft Windows Adobe Type Manager Library Remote Code Execution
- CVE-2015-1769 Microsoft Windows Mount Manager Privilege Escalation
- CVE-2020-1467 Windows Hard Link Elevation of Privilege Vulnerability
- CVE-2021-26424 Windows TCP/IP Remote Code Execution Vulnerability
- CVE-2021-28476 Windows Hyper-V Remote Code Execution Vulnerability
Sources
Also known as GHSA-q33m-rrqm-6xhw.