Microsoft Office SharePoint
CVE-2020-16951 — Microsoft SharePoint Remote Code Execution Vulnerability
Executive Summary
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. Exploitation of this vulnerability requires that a user uploads a specially crafted SharePoint application package to an affected version of SharePoint. The security update addresses the vulnerability by correcting how SharePoint checks the source markup of application packages.
Overview
8.6
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
Temporal Score: 7.7
EPSS Score
0.01309
probability of exploitation in the next 30 days
0.66894 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
3 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft SharePoint Enterprise Server 2016 | 4486677 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft SharePoint Foundation 2013 Service Pack 1 | 4486694 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft SharePoint Server 2019 | 4486676 (Security Update) |
Critical | Remote Code Execution | Maybe |
Patches
3 patches
| Article | Type | Restart |
|---|---|---|
4486677 |
Security Update | Maybe |
4486694 |
Security Update | Maybe |
4486676 |
Security Update | Maybe |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
References
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