Remote Code Execution Vulnerability in Microsoft Office SharePoint
CVE-2026-65663

8.8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Sharepoint Enterprise Server 2016
Microsoft Sharepoint Server 2019
Microsoft Sharepoint Server Subscription Edition
Vendor
CVE Published:
11 August 2026

What is CVE-2026-65663?

A vulnerability in Microsoft Office SharePoint allows an authorized attacker to exploit deserialization of untrusted data. This flaw can enable the attacker to execute code remotely, potentially compromising the security of the affected system and exposing sensitive data. Proper mitigation strategies, including timely updates and security patches, are essential for protecting against this threat. For more information and to apply necessary patches, refer to the Microsoft Advisory.

Affected Version(s)

Microsoft SharePoint Enterprise Server 2016 x64-based Systems 16.0.0 < 16.0.5565.1001

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

.