CVE-2020-1147

CVSS 3.1 High 7.8Known exploited (CISA KEV)

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Description

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'.

Key data

CVSS 3.1 High 7.8

Score published by CISA-ADP in the CVE record.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack vector: Local
The attacker needs local access to the system, or to trick a user into running something.
Attack complexity: Low
No special conditions are needed. The attack can be repeated at will.
Privileges required: None
No account or privileges are needed.
User interaction: Required
A user has to do something first, such as opening a file or following a link.
Scope: Unchanged
The impact stays within the vulnerable component.
Confidentiality impact: High
Serious or total effect on the secrecy of data.
Integrity impact: High
Serious or total effect on the trustworthiness of data.
Availability impact: High
Serious or total effect on availability.

Metric	Value	What it means
Attack vector	Local	The attacker needs local access to the system, or to trick a user into running something.
Attack complexity	Low	No special conditions are needed. The attack can be repeated at will.
Privileges required	None	No account or privileges are needed.
User interaction	Required	A user has to do something first, such as opening a file or following a link.
Scope	Unchanged	The impact stays within the vulnerable component.
Confidentiality impact	High	Serious or total effect on the secrecy of data.
Integrity impact	High	Serious or total effect on the trustworthiness of data.
Availability impact	High	Serious or total effect on availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score: 0.95804 (95.8% probability)
Percentile: 99.9%
Scores of: Nov 10, 2026
Model: v2026.06.15

CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog: Microsoft .NET Framework, SharePoint, and Visual Studio Remote Code Execution Vulnerability
Added to the catalog: Nov 3, 2021
Federal due date: May 3, 2022

CISA assessment as of Feb 4, 2025

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation: Recorded by CISA as active
Automatable: no
Technical impact: total

Affected products

Products listed in the CVE record, as the CNA published them.

Microsoft SharePoint Enterprise Server
- affected: 2016
- affected: 2013 Service Pack 1
Microsoft SharePoint Server
- affected: 2019
- affected: 2010 Service Pack 2
Microsoft Visual Studio 2019
- affected: 16.0
Microsoft Visual Studio 2019 version 16.6 (includes 16.0 - 16.5)
- affected: unspecified
Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)
- affected: unspecified
Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)
- affected: unspecified
Microsoft .NET Core
- affected: 2.1
- affected: 3.1
Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2
- affected: Windows 7 for 32-bit Systems Service Pack 1
- affected: Windows 7 for x64-based Systems Service Pack 1
- affected: Windows 8.1 for 32-bit systems
- affected: Windows 8.1 for x64-based systems
- affected: Windows RT 8.1
- affected: Windows Server 2008 R2 for x64-based Systems Service Pack 1
- affected: Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
- affected: Windows Server 2012
- affected: Windows Server 2012 (Server Core installation)
- affected: Windows Server 2012 R2
- affected: Windows Server 2012 R2 (Server Core installation)
Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation)
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows Server 2016
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation)
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows 7 for 32-bit Systems Service Pack 1
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows 7 for x64-based Systems Service Pack 1
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows RT 8.1
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows Server 2012
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation)
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows Server 2012 R2
- affected: unspecified
Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation)
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation)
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for 32-bit Systems
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1909 for x64-based Systems
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1909 (Server Core installation)
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for 32-bit Systems
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for x64-based Systems
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1903 (Server Core installation)
- affected: 1903
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for 32-bit Systems
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1803 for x64-based Systems
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server, version 1803 (Server Core Installation)
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for ARM64-based Systems
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation)
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit Systems
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based Systems
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016
- affected: unspecified
Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation)
- affected: unspecified

and 18 more

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

Timeline

ID reservedNov 4, 2019
Record publishedJul 14, 2020
Added to CISA KEVNov 3, 2021
Record last updatedOct 21, 2025

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:35 UTC. Sources and licenses