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CVE-2020-0646

Published: Jan 14, 2020Updated: Oct 29, 2025 Sources: CVE List NVD BDUCWE-91
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
99.2%
Top 0.1%
CISA KEV
Active Exploitation
Since Nov 3, 2021
Exploits
1 Known
Remediation
Patch Available
Am I actually vulnerable?1 Nuclei template available — see how to check your systems. How to verify

Description

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

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-91

Affected Products

Microsoft .NET Framework 3.5Microsoft Corp
LibraryLibrary
Operating Systems / windows
Microsoft .NET Framework 3.5.1Microsoft Corp
LibraryLibrary
OSS Libraries / generic-library
Microsoft .NET Framework 4.5.2Microsoft Corp
LibraryLibrary
OSS Libraries / generic-library
Microsoft .NET Framework 4.6Microsoft Corp
On-premOS
Operating Systems / windows
Microsoft .NET Framework 4.6.1Microsoft Corp
LibraryLibrary
OSS Libraries / generic-library
microsoft corpcommercialUSOperating Systemsaka microsoft corporation
and 59 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Nov 3, 2021
Remediation due:May 3, 2022

Required action: Apply updates per vendor instructions.

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0646
portal.msrc.microsoft.com
https://nvd.nist.gov/vuln/detail/CVE-2020-0646
nvd.nist.gov
http://packetstormsecurity.com/files/156930/SharePoint-Workflows-XOML-Injection.html
packetstormsecurity.com
and 2 more references View all →

Timeline

Published
Jan 14, 2020
Added to CISA KEV
Nov 3, 2021
Last Updated
Oct 29, 2025

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