Microsoft SharePoint Server Remote Code Execution Vulnerability

published 2020-05-21 6 y ago modified 2026-08-19 2 mo ago also EUVD-2020-11960

cvss: 8.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 4.0%; EPSS 4.0% chance of exploitation in 30 days, percentile 90%
public exploits: 0; none known

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. To exploit the vulnerability, an authenticated user must create and invoke a specially crafted page on an affected version of Microsoft SharePoint Server. The security update addresses the vulnerability by correcting how Microsoft SharePoint Server handles processing of created content.

Patch / fix

links 2

Exploit prediction

4.01% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	8.8	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

Microsoft Microsoft SharePoint Enterprise Server 2016
Microsoft Microsoft SharePoint Foundation 2013 Service Pack 1
Microsoft Microsoft SharePoint Server 2019

Classification

Weakness

CWE-476 NULL Pointer Dereference

References

msrc.microsoft.com /update-guide/vulnerability/CVE-2020-1069
vendor-advisory, patch
portal.msrc.microsoft.com /en-US/security-guidance/advisory/CVE-2020-1069
patch, vendor-advisory
nvidia.custhelp.com /app/answers/detail/a_id/5147
not-applicable

Sources

CVE List CVE-2020-1069
NVD CVE-2020-1069

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary