Elevation of Privilege Vulnerability in Microsoft Office SharePoint
CVE-2026-88164

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Sharepoint Server Subscription Edition
Vendor
CVE Published:
14 October 2026

What is CVE-2026-88164?

An authorization flaw in Microsoft Office SharePoint allows an attacker with valid credentials to exploit this vulnerability and gain elevated privileges. This could enable unauthorized access to sensitive data or administrative controls over the SharePoint environment, potentially leading to significant security risks within the network. Organizations using SharePoint should ensure that their systems are patched and monitored to mitigate the risks associated with this vulnerability.

Affected Version(s)

Microsoft SharePoint Server Subscription Edition x64-based Systems 16.0.0 < 16.0.20326.20190

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.