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CVE-2020-16952

Microsoft SharePoint Remote Code Execution Vulnerability

HIGH
8.6
CVSS Score
Published: October 16, 2020 at 10:18 PM UTC
Updated: June 17, 2026 at 02:58 AM UTC
5 products affected across 1 vendorSharePoint ServerSharePoint Enterprise ServerSharePoint Foundation

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Severity
HIGH8.6
Exploit prediction
EPSS 71%

Description

<p>A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the SharePoint application pool and the SharePoint server farm account.</p> <p>Exploitation of this vulnerability requires that a user uploads a specially crafted SharePoint application package to an affected version of SharePoint.</p> <p>The security update addresses the vulnerability by correcting how SharePoint checks the source markup of application packages.</p>

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

SharePoint Enterprise Server· Microsoft
95%
2016
SharePoint Foundation· Microsoft
95%
15.0.0 ≤ v < publication15.0.020132013 sp1
Affected range stops below publication, so it looks safe — our inference, not a vendor statement
SharePoint Server· Microsoft
95%
20162019
SharePoint Enterprise Server 2016· Microsoft
60%
16.0.0 ≤ v < publication16.0.0
Affected range stops below publication, so it looks safe — our inference, not a vendor statement
SharePoint Server 2019· Microsoft
60%
16.0.0 ≤ v < publication16.0.0
Affected range stops below publication, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
http://packetstormsecurity.com/files/159612/Microsoft-SharePoint-SSI-ViewState-Remote-Code-Execution.html
x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16952

CVSS

8.6HIGHmicrosoft
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-346

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