CVE-2021-1647: Microsoft Defender Remote Code Execution Vulnerability

Published Jan 12, 2021
·
Updated

Microsoft Defender contains an unspecified vulnerability that allows for remote code execution.

Other sources

Microsoft Defender Remote Code Execution Vulnerability

NVD

Affected Software

50 affected components
Microsoft System Center Endpoint Protection
Microsoft Security Essentials
Microsoft System Center 2012 R2 Endpoint Protection
Microsoft System Center 2012 Endpoint Protection
Microsoft Defender
Microsoft Windows Defender
All of the following
Microsoft Windows Defender
Any of the following
Microsoft Windows 10 1507
Microsoft Windows 10 1607
Microsoft Windows 10 1803
Microsoft Windows 10 1809
Microsoft Windows 10 1909
Microsoft Windows 10 2004
Microsoft Windows 10 20h2
Microsoft Windows 7=sp1
Microsoft Windows 8.1
Microsoft Windows RT 8.1
Microsoft Windows Server 1909
Microsoft Windows Server 2004
Microsoft Windows Server 2008=sp2
Microsoft Windows Server 2008=r2-sp1
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016
Microsoft Windows Server 2019
Microsoft Windows Server 20h2
Microsoft Security Essentials
Microsoft System Center Endpoint Protection
Microsoft System Center Endpoint Protection=2012
Microsoft System Center Endpoint Protection=2012-r2
Microsoft Windows Defender
Microsoft Windows 10
Microsoft Windows 10=20h2
Microsoft Windows 10=1607
Microsoft Windows 10=1803
Microsoft Windows 10=1809
Microsoft Windows 10=1909
Microsoft Windows 10=2004
Microsoft Windows 7=sp1
Microsoft Windows 8.1
Microsoft Windows RT 8.1
Microsoft Windows Server 2008=sp2
Microsoft Windows Server 2008=r2-sp1
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016
Microsoft Windows Server 2016=20h2
Microsoft Windows Server 2016=1909
Microsoft Windows Server 2016=2004
Microsoft Windows Server 2019

Event History

Jan 12, 2021
CVE Published
via Microsoft·08:00 AM
Known Exploited
via Microsoft·08:00 AM
Data Sourced
via Microsoft·08:00 AM
DescriptionSeverityWeakness
CVE Published
via MITRE·07:42 PM
Data Sourced
via MITRE·07:42 PM
DescriptionSeverity
Data Sourced
via NVD·08:15 PM
RemedyDescriptionSeverityAffected Software
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is CVE-2021-1647?

CVE-2021-1647 is a vulnerability in Microsoft Defender that allows for remote code execution.

2

How severe is CVE-2021-1647?

CVE-2021-1647 has a severity rating of 7.8 (high).

3

Which software is affected by CVE-2021-1647?

The affected software includes Microsoft Defender, Microsoft Windows Defender, Microsoft Windows 10, Microsoft Windows 7, Microsoft Windows 8.1, Microsoft Windows RT 8.1, Microsoft Windows Server 2008, Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Security Essentials, and Microsoft System Center Endpoint Protection.

4

How do I fix CVE-2021-1647?

To fix CVE-2021-1647, apply the security updates provided by Microsoft.

5

Where can I find more information about CVE-2021-1647?

You can find more information about CVE-2021-1647 on the Microsoft Security Guidance Advisory page: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1647

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203