CVE-2021-1647 Microsoft Defender Remote Code Execution
An attacker can execute arbitrary code on systems running Microsoft Defender or related endpoint protection products.
- Exploited in the wild
- Since 3 Nov 2021
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-1647?
CVE-2021-1647 is a high-severity code injection vulnerability in Microsoft Security Essentials, published on 12 Jan 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Microsoft Defender Remote Code Execution Vulnerability
Which versions are affected by CVE-2021-1647?
It affects 3 products.
Products include Microsoft Security Essentials, Microsoft System Center Endpoint Protection, Microsoft Windows Defender.
How do I fix CVE-2021-1647?
No fix has been published for CVE-2021-1647 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Nov 2021.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2021-1647 being exploited?
Yes. Attackers have exploited CVE-2021-1647 in the wild since at least 3 Nov 2021.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-4v4q-r2mh-q7w6.