Microsoft Office SharePoint Remote Code Execution Vulnerability

Summary

Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.

Products covered

• Microsoft SharePoint Server Subscription Edition

Remediation

Install KB5002945.

Vendor-listed fixes

• 16.0.20326.20278

CVEs in this advisory 1

CVE-2026-109464

Updates

1. Nov 10, 2026 at 8:00 AM UTC
   Published by Microsoft Security Response Center

   The publication date reported by the vendor.

2. Nov 10, 2026 at 8:15 PM UTC
   Added to SecurityAlert

   We collected the advisory from the official source.