Microsoft Office SharePoint
CVE-2019-1296 — Microsoft SharePoint Remote Code Execution Vulnerability
Executive Summary
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. Exploitation of this vulnerability requires that a user access a susceptible API on an affected version of SharePoint with specially-formatted input. The security update addresses the vulnerability by correcting how SharePoint handles deserialization of untrusted data.
Overview
8.8
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
More Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
EPSS Score
0.08328
probability of exploitation in the next 30 days
0.94439 percentile - updated 2026-08-14
View on FIRST.org
Affected Products
3 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft SharePoint Enterprise Server 2016 | 4475590 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft SharePoint Foundation 2013 Service Pack 1 | 4484098 (Security Update) |
Critical | Remote Code Execution | Maybe |
| Microsoft SharePoint Server 2019 | 4475596 (Security Update) |
Critical | Remote Code Execution | Maybe |
Patches
3 patches
| Article | Type | Restart |
|---|---|---|
4475590 |
Security Update | Maybe |
4484098 |
Security Update | Maybe |
4475596 |
Security Update | Maybe |
Exploits & PoC
No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
Markus Wulftange ( @mwulftange
References
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