CVE-2020-1147

KEVMicrosoft .NET Framework, SharePoint, and Visual Studio Remote Code Execution Vulnerability

Description

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.

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'.

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

PublishedJul 14, 2020

Last modifiedJun 17, 2026

Added to KEVNov 3, 2021

Remediation dueMay 3, 2022

References

packetstormsecurity.com/files/158694/SharePoint-DataSet-DataTable-Deserialization.htmlExploitThird Party Advisory
packetstormsecurity.com/files/158876/Microsoft-SharePoint-Server-2019-Remote-Code-Execution.htmlExploitThird Party Advisory
packetstormsecurity.com/files/163644/Microsoft-SharePoint-Server-2019-Remote-Code-Execution.htmlExploitThird Party Advisory
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1147PatchVendor Advisory
exploitalert.com/view-details.html?id=35992ExploitThird Party Advisory
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-1147US Government Resource

0 recent articles mention this CVE

Risk assessment · High

Actively exploited. Patch immediately.

Exploitation: Confirmed in the wild (CISA KEV)
Federal remediation deadline: Overdue by 1638 days
CVSS: 7.8 HIGH
EPSS (30-day exploit probability): 94.0% · top 1% of all CVEs
Weakness: NVD-CWE-Other

Recommended actions

1.Apply updates per vendor instructions.
2.Treat as emergency change: patch or isolate internet-facing instances first.
3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.

Assessment is derived automatically from the live signals above; verify against your own asset inventory.