Microsoft Office SharePoint
CVE-2026-56164 — Microsoft SharePoint Server Elevation of Privilege Vulnerability
Executive Summary
Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.
Overview
5.3
CVSS MEDIUM
Moderate
MS Severity
Exploited
MS Exploit Status
Exploitation Detected
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
None
INTEGRITY
Low
AVAILABILITY
None
EXPLOIT CODE MATURITY
Functional
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 4.9
EPSS Score
No EPSS score available for this CVE.
View on FIRST.orgAffected Products
3 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft SharePoint Enterprise Server 2016 | 5002891 (Security Update) |
Moderate | Elevation of Privilege | Maybe |
| Microsoft SharePoint Server 2019 | 5002883 (Security Update) |
Moderate | Elevation of Privilege | Maybe |
| Microsoft SharePoint Server Subscription Edition | 5002882 (Security Update) |
Moderate | Elevation of Privilege | Maybe |
Patches
3 patches
| Article | Type | Restart |
|---|---|---|
5002891 |
Security Update | Maybe |
5002883 |
Security Update | Maybe |
5002882 |
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
Anonymous, Google Cloud, FLARE OTF, Mandiant Incident Response
References
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