Remote Code Execution Vulnerability in Microsoft Office SharePoint
CVE-2026-85900

8.8HIGH

Key Information:

Vendor

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

What is CVE-2026-85900?

A vulnerability in Microsoft Office SharePoint allows authorized attackers to execute arbitrary code on the network by exploiting deserialization of untrusted data. This issue emphasizes the importance of validating input data and securing applications against unauthorized code execution, potentially leading to severe breaches and compromised systems.

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

.