Microsoft Office OneNote Remote Code Execution Vulnerability
CVE-2026-126526
Summary
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
Products covered
Microsoft SharePoint Enterprise Server 2016
Microsoft SharePoint Server 2019
Microsoft SharePoint Server Subscription Edition
Remediation
Install KB5002861. Install KB5002862. Install KB5002854. Install KB5002856. Install KB5002853.
Vendor-listed fixes
16.0.5548.1003
16.0.10417.20114
16.0.19725.20210
CVEs in this advisory 1
Updates
- Published by Microsoft Security Response Center
The publication date reported by the vendor.
- Added to SecurityAlert
We collected the advisory from the official source.
- Confirmed at the source
Our collector saw this advisory during a later source check.