Remote Code Execution Vulnerability in Microsoft Office SharePoint
CVE-2026-40365

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Sharepoint Enterprise Server 2016
Microsoft Sharepoint Server 2019
Microsoft Sharepoint Server Subscription Edition
Vendor
CVE Published:
12 May 2026

What is CVE-2026-40365?

A vulnerability exists in Microsoft Office SharePoint due to insufficient granularity of access control, which could enable an authorized attacker to execute arbitrary code over a network. This flaw poses significant risks to data integrity and system security if exploited. It is critical for organizations using Office SharePoint to apply the appropriate patches and updates to mitigate potential threats.

Affected Version(s)

Microsoft SharePoint Enterprise Server 2016 x64-based Systems 16.0.0 < 16.0.5552.1002

Microsoft SharePoint Server 2019 x64-based Systems 16.0.0 < 16.0.10417.20128

Microsoft SharePoint Server Subscription Edition x64-based Systems 16.0.0 < 16.0.19725.20280

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

.