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CVE-2020-1595

Microsoft SharePoint Remote Code Execution Vulnerability

CRITICAL
9.9
CVSS Score
Published: September 11, 2020 at 05:09 PM UTC
Updated: June 17, 2026 at 03:01 AM UTC
5 products affected across 1 vendorSharePoint ServerSharePoint Enterprise ServerSharePoint Foundation

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Severity
CRITICAL9.9
Exploit prediction
EPSS 2%
SSVC
No known exploit

Description

<p>A remote code execution vulnerability exists in Microsoft SharePoint where APIs aren't properly protected from unsafe data input. 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 access a susceptible API on an affected version of SharePoint with specially-formatted input.</p> <p>The security update addresses the vulnerability by correcting how SharePoint handles deserialization of untrusted data.</p>

Affected

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

SharePoint Enterprise Server· Microsoft
95%
15.0.0 ≤ v < publication15.0.02013 sp12016
Affected range stops below publication, so it looks safe — our inference, not a vendor statement
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%
201320162019
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 (1)

x_refsource_MISCPatchVendor Advisory
Source: [email protected]
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1595

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.9CRITICALmicrosoft
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-494

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