.NET Denial of Service Vulnerability
CVE-2026-120796
Summary
Access of resource using incompatible type ('type confusion') in Microsoft Office Word allows an unauthorized attacker to execute code locally.
Products covered
Microsoft SharePoint Enterprise Server 2016
Microsoft SharePoint Server 2019
Microsoft Office 2019 for 32-bit editions
Microsoft Office 2019 for 64-bit editions
Microsoft 365 Apps for Enterprise for 32-bit Systems
Microsoft 365 Apps for Enterprise for 64-bit Systems
Microsoft Office LTSC for Mac 2021
Microsoft Office LTSC 2021 for 64-bit editions
Show 7 more products
Microsoft Office LTSC 2021 for 32-bit editions
Microsoft SharePoint Server Subscription Edition
Microsoft Office LTSC 2024 for 32-bit editions
Microsoft Office LTSC 2024 for 64-bit editions
Microsoft Office LTSC for Mac 2024
Microsoft Word 2016 (32-bit edition)
Microsoft Word 2016 (64-bit edition)
Remediation
Click to Run Release Notes Install KB5002868. Install KB5002869. Install KB5002870. Install KB5002872. Install KB5002863. Install KB5002858.
Vendor-listed fixes
16.0.5552.1002
16.0.10417.20128
https://aka.ms/OfficeSecurityReleases
16.109.26051019
16.0.19725.20280
16.0.5552.1000
CVEs in this advisory 1
Updates
- Published by Microsoft Security Response Center
The publication date reported by the vendor.
- Updated by Microsoft Security Response Center
The vendor changed the advisory after it was first published.
- 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.