CVE-2021-43893 Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability
An attacker can exploit a flaw in Windows Encrypting File System to elevate privileges on affected Windows operating systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-43893?
CVE-2021-43893 is a high-severity vulnerability in Microsoft Windows 10, published on 15 Dec 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability
Weakness: CWE-668
Which versions are affected by CVE-2021-43893?
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-2021-43893?
No fix has been published for CVE-2021-43893 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-43893 being exploited?
There is no known exploitation of CVE-2021-43893 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-jx9r-hrmg-9q76.