CVE-2020-0646: Microsoft .NET Framework Remote Code Execution Vulnerability

Published Jan 14, 2020
·
Updated

A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly, aka '.NET Framework Remote Code Execution Injection Vulnerability'.

Other sources

Microsoft .NET Framework contains an improper input validation vulnerability that allows for remote code execution.

— CISA

Affected Software

112 affected components
Microsoft .NET Framework
Microsoft .NET Framework=3.0-sp2
Microsoft Windows Server 2008=sp2
Microsoft .NET Framework=3.5
Microsoft Windows 10=1607
Microsoft Windows 8.1
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft .NET Framework=4.6.2
Microsoft .NET Framework=4.7
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Microsoft Windows 10=1607
Microsoft Windows Server 2016
Microsoft Windows 10=1709
Microsoft Windows 10
Microsoft Windows 10=1803
Microsoft Windows 10=1809
Microsoft Windows Server 2016=1803
Microsoft Windows Server 2019
Microsoft .NET Framework=4.8
Microsoft Windows 10=1903
Microsoft Windows 10=1909
Microsoft Windows Server 2016=1909
Microsoft .NET Framework=3.5.1
Microsoft Windows 7=sp1
Microsoft Windows Server 2008=r2-sp1
Microsoft Windows Server 2008=r2-sp1
Microsoft .NET Framework=4.5.2
Microsoft Windows RT 8.1
Microsoft .NET Framework=4.6
Microsoft .NET Framework=4.6.1
All of the following
Microsoft .NET Framework=3.0-sp2
Microsoft Windows Server 2008=sp2
All of the following
Microsoft .NET Framework=3.5
Any of the following
Microsoft Windows 10 1607
Microsoft Windows 10 1607
Microsoft Windows 8.1
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.6.2
Microsoft .NET Framework=4.7
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Any of the following
Microsoft Windows 10 1607
Microsoft Windows 10 1607
Microsoft Windows Server 2016
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Any of the following
Microsoft Windows 10 1709
Microsoft Windows 10 1709
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.7.2
Any of the following
Microsoft Windows 10 1507
Microsoft Windows 10 1507
Microsoft Windows 10 1803
Microsoft Windows 10 1803
Microsoft Windows 10 1809
Microsoft Windows 10 1809
Microsoft Windows Server 2016=1803
Microsoft Windows Server 2019
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.8
Any of the following
Microsoft Windows 10 1809
Microsoft Windows 10 1903
Microsoft Windows 10 1909
Microsoft Windows Server 2016=1909
Microsoft Windows Server 2019
All of the following
Microsoft .NET Framework=3.5.1
Any of the following
Microsoft Windows 7=sp1
Microsoft Windows Server 2008=r2-sp1
Microsoft Windows Server 2008=r2-sp1
All of the following
Microsoft .NET Framework=4.5.2
Any of the following
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
All of the following
Microsoft .NET Framework=4.6
Microsoft Windows Server 2008=sp2
All of the following
Any of the following
Microsoft .NET Framework=4.6.2
Microsoft .NET Framework=4.7
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Microsoft Windows 10 1607
All of the following
Any of the following
Microsoft .NET Framework=4.6
Microsoft .NET Framework=4.6.1
Microsoft .NET Framework=4.6.2
Microsoft .NET Framework=4.7
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Any of the following
Microsoft Windows 7=sp1
Microsoft Windows 8.1
Microsoft Windows RT 8.1
Microsoft Windows Server 2008=r2-sp1
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
All of the following
Microsoft .NET Framework=4.8
Any of the following
Microsoft Windows 10 1607
Microsoft Windows 10 1709
Microsoft Windows 10 1803
Microsoft Windows 7=sp1
Microsoft Windows 8.1
Microsoft Windows RT 8.1
Microsoft Windows Server 2008=r2-sp1
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016

Remediation

Patch Available

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0646

Event History

Jan 14, 2020
CVE Published
via MITRE·11:11 PM
Data Sourced
via MITRE·11:11 PM
DescriptionWeakness
Data Sourced
via NVD·11:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Nov 3, 2021
Known Exploited
via CISA·12:00 AM
Sep 26, 58448
Event
09:26 AM
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-2020-0646?

CVE-2020-0646 is a remote code execution vulnerability in the Microsoft .NET Framework.

2

What is the severity of CVE-2020-0646?

CVE-2020-0646 has a severity rating of 9.8, which is considered critical.

3

How does CVE-2020-0646 impact Microsoft .NET Framework?

CVE-2020-0646 allows remote attackers to execute code on systems running Microsoft .NET Framework by exploiting input validation vulnerabilities.

4

Is Windows Server 2012 affected by CVE-2020-0646?

No, Windows Server 2012 is not vulnerable to CVE-2020-0646.

5

How can I fix CVE-2020-0646?

To fix CVE-2020-0646, apply the latest security updates provided by Microsoft.

Company

Resources

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