---
title: "CVE-2020-16952: Microsoft SharePoint Remote Code… | CubePath"
description: "<p>A remote code execution vulnerability exists in Microsoft SharePoint when the software fails to check the source markup of an application package…"
language: en
source: https://cubepath.com/security/cve/CVE-2020-16952
---

# CVE-2020-16952: Microsoft SharePoint Remote Code… | CubePath

## 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>

Official description from the CVE record, published by microsoft. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-16952)

## Key data

### CVSS 3.1 High 8.6

Score published by microsoft in the CVE record.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L/E:P/RL:O/RC:C

| Metric                 | Value     | What it means                                                                       |
| ---------------------- | --------- | ----------------------------------------------------------------------------------- |
| Attack vector          | Network   | The vulnerable component can be reached over a network, possibly from the Internet. |
| 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       | None      | No action from any user is needed.                                                  |
| Scope                  | Unchanged | The impact stays within the vulnerable component.                                   |
| Confidentiality impact | Low       | Limited effect on the secrecy of data.                                              |
| Integrity impact       | High      | Serious or total effect on the trustworthiness of data.                             |
| Availability impact    | Low       | Limited 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](https://www.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

0.71095 (71.1% probability)

Percentile

99.4%

Scores of

Nov 10, 2026

Model

v2026.06.15

## Affected products

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

- Microsoft SharePoint Enterprise Server 2016

  - affected: 16.0.0 up to before publication
- Microsoft SharePoint Server 2019

  - affected: 16.0.0 up to before publication
- Microsoft SharePoint Foundation 2013 Service Pack 1

  - affected: 15.0.0 up to before publication

## References

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

- [portal.msrc.microsoft.com/en-US/security-guidance/advisory/…](https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16952)
- [packetstormsecurity.com/files/159612/Microsoft-SharePoint-S…](http://packetstormsecurity.com/files/159612/Microsoft-SharePoint-SSI-ViewState-Remote-Code-Execution.html)

## Timeline

1. ID reserved Aug 4, 2020
2. Record published Oct 16, 2020
3. Record last updated Aug 4, 2024

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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, 20:02 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)