Remote Code Execution Vulnerability in Microsoft Office SharePoint
CVE-2026-65665

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Sharepoint Server 2019
Microsoft Sharepoint Server Subscription Edition
Vendor
CVE Published:
11 August 2026

What is CVE-2026-65665?

A deserialization of untrusted data vulnerability in Microsoft Office SharePoint Server enables authorized attackers to execute arbitrary code over a network. This flaw can potentially compromise systems and sensitive data, emphasizing the importance of prompt patch management and security best practices.

Affected Version(s)

Microsoft SharePoint Server 2019 x64-based Systems 16.0.0 < 16.0.10417.20198

Microsoft SharePoint Server Subscription Edition x64-based Systems 16.0.0 < 16.0.19725.20522

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

.