Microsoft Office SharePoint
CVE-2019-1443 — Microsoft SharePoint Information Disclosure Vulnerability
Executive Summary
An information disclosure vulnerability exists in Microsoft SharePoint when an attacker uploads a specially crafted file to the SharePoint Server. An authenticated attacker who successfully exploited this vulnerability could potentially leverage SharePoint functionality to obtain SMB hashes. The security update addresses the vulnerability by correcting how SharePoint checks file content.
Overview
6.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
EPSS Score
0.0537
probability of exploitation in the next 30 days
0.91938 percentile - updated 2026-08-14
View on FIRST.org
Affected Products
4 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft SharePoint Enterprise Server 2016 | 4484143 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft SharePoint Foundation 2010 Service Pack 2 | 4484165 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft SharePoint Foundation 2013 Service Pack 1 | 4484157 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft SharePoint Server 2019 | 4484142 (Security Update) |
Important | Information Disclosure | Maybe |
Patches
4 patches
| Article | Type | Restart |
|---|---|---|
4484143 |
Security Update | Maybe |
4484165 |
Security Update | Maybe |
4484157 |
Security Update | Maybe |
4484142 |
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
Saif ElSherei of MSRC Vulnerabilities and Mitigations Team
References
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