# CVE-2020-1069: Microsoft SharePoint Server Remote Code Execution Vulnerability

CVE-2020-1069 is fixed in 3 products on 1 platform, first by KB4484336, released May 12, 2020. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2020-1069
- Priority: Urgent
- CVSS: n/a (Critical)
- EPSS: 0.0401
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: May 12, 2020
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1069

## Description

<p>A remote code execution vulnerability exists in Microsoft SharePoint Server when it fails to properly identify and filter unsafe ASP.Net web controls. An authenticated attacker who successfully exploited the vulnerability could use a specially crafted page to perform actions in the security context of the SharePoint application pool process.</p> <p>To exploit the vulnerability, an authenticated user must create and invoke a specially crafted page on an affected version of Microsoft SharePoint Server.</p> <p>The security update addresses the vulnerability by correcting how Microsoft SharePoint Server handles processing of created content.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Microsoft | Microsoft SharePoint Enterprise Server 2016 |  | [KB4484336](https://patchblox.com/security/data/fix/microsoft/kb4484336.md) | May 12, 2020 |
| Microsoft | Microsoft SharePoint Foundation 2013 Service Pack 1 |  | [KB4484364](https://patchblox.com/security/data/fix/microsoft/kb4484364.md) | May 12, 2020 |
| Microsoft | Microsoft SharePoint Server 2019 |  | [KB4484332](https://patchblox.com/security/data/fix/microsoft/kb4484332.md) | May 12, 2020 |

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Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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