Vulnerability · CVE-2020-1147
Microsoft .NET Framework, SharePoint, and Visual Studio Remote Code Execution Vulnerability
Published Jul 14, 2020 · catalog updated Jun 16, 2026 · Microsoft .NET Framework, SharePoint, Visual Studio
Patch now
CVE-2020-1147 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Microsoft .NET Framework, SharePoint, Visual Studio against the vendor advisory and apply that fix. The CVSS score does not change the priority.
- Severity
- High7.8
- Known exploitation
- CISA KEV and VulnCheck KEV
- EPSS
- 93.97%
- Remediation
- Remediation guidance
- Affected products
- cpe microsoft/.net core · cpe microsoft/.net framework · vendor Microsoft .NET Framework, SharePoint, Visual Studio
Microsoft .NET Framework, Microsoft SharePoint, and Visual Studio contain a remote code execution vulnerability when the software fails to check the source markup of XML file input. Successful exploitation allows an attacker to execute code in the context of the process responsible for deserialization of the XML content.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe microsoft/.net core2.1
- cpe microsoft/.net core3.1
- cpe microsoft/.net framework2.0
- cpe microsoft/.net framework3.0
- cpe microsoft/.net framework3.5
- cpe microsoft/.net framework4.6.2
- cpe microsoft/.net framework4.7
- vendor Microsoft .NET Framework, SharePoint, Visual Studioversion unspecified
How to fix CVE-2020-1147
Recommended remediation
Apply updates per vendor instructions. CISA due date May 3, 2022.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
CVE-2020-1147 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Microsoft .NET Framework, SharePoint, Visual Studio against the vendor advisory and apply that fix. The CVSS score does not change the priority.
Which versions are affected?
Compare what you have installed with microsoft/.net core 2.1; microsoft/.net core 3.1; microsoft/.net framework 2.0; microsoft/.net framework 3.0. Apply updates per vendor instructions.
What should an analyst verify?
No weakness class is stored. EPSS 93.97%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Jul 14, 2020 · Catalog
Detected
Microsoft .NET Framework, Microsoft SharePoint, and Visual Studio contain a remote code execution vulnerability when the software fails to check the source markup of XML file input. Successful exploitation allows an attacker to execute code in the context of the process responsible for deserialization of the XML content.
Nov 3, 2021 · CISA KEV
Known exploited
Apply updates per vendor instructions.
May 3, 2022 · CISA KEV
Remediation due
Apply updates per vendor instructions.
Jun 16, 2026 · Catalog
Updated
Microsoft .NET Framework, Microsoft SharePoint, and Visual Studio contain a remote code execution vulnerability when the software fails to check the source markup of XML file input. Successful exploitation allows an attacker to execute code in the context of the process responsible for deserialization of the XML content.
Sources
- CISA KEVConfirmed exploitationCVE-2020-1147
Microsoft .NET Framework, Microsoft SharePoint, and Visual Studio contain a remote code execution vulnerability when the software fails to check the source markup of XML file input. Successful exploitation allows an attacker to execute code in the context of the process responsible for deserialization of the XML content.
cisa.gov - CVE.orgVulnerability recordCVE-2020-1147
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2020-1147
30-day exploitation probability 94.0%
first.org - Exploit DatabasePublic exploit reference48747
Public archive entry. The exploit body is not stored here.
exploit-db.com - Exploit DatabasePublic exploit reference50151
Public archive entry. The exploit body is not stored here.
exploit-db.com - Metasploit ModulesPublic exploit moduleexploit_windows/http/sharepoint_data_deserialization
Public module reference (excellent). Module source is not copied into this catalog.
rapid7.com - NIST NVDVulnerability recordCVE-2020-1147
A remote code execution vulnerability exists in .NET Framework, Microsoft SharePoint, and Visual Studio when the software fails to check the source markup of XML file input, aka '.NET Framework, SharePoint Server, and Visual Studio Remote Code Execution Vulnerability'.
nvd.nist.gov - Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/158694/SharePoint-DataSet-DataTable-Deserialization.html
Packet Storm link already published on the finding.
packetstormsecurity.com - Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/158876/Microsoft-SharePoint-Server-2019-Remote-Code-Execution.html
Packet Storm link already published on the finding.
packetstormsecurity.com - Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/163644/Microsoft-SharePoint-Server-2019-Remote-Code-Execution.html
Packet Storm link already published on the finding.
packetstormsecurity.com - VulnCheck KEVConfirmed exploitationCVE-2020-1147
Microsoft .NET Framework, Microsoft SharePoint, and Visual Studio contain a remote code execution vulnerability when the software fails to check the source markup of XML file input. Successful exploitation allows an attacker to execute code in the context of the process responsib
vulncheck.com
References
Freshness
Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.