Microsoft Office OneNote Remote Code Execution Vulnerability
CVE-2026-126526
Summary
Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Products covered
Windows 11 Version 26H1 for ARM64-based Systems
Windows 11 version 26H1 for x64-based Systems
Remote Desktop client for Windows Desktop
Remediation
Release Notes Install KB5083768.
Vendor-listed fixes
10.0.28000.1836
1.2.7099.0
CVEs in this advisory 1
Update history
What changed in later vendor updates
SecurityAlert records field-level changes from the point we begin following a bulletin. Earlier vendor changes may not have a field-by-field record.
- Removed affected products: Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for....
- Added fixed versions: 1.2.7099.0.
- Removed fixed versions: 2.0.1070.0, 6.2.9200.26026, 6.3.9600.23132, 10.0.14393.9060, 10.0.17763.8644.
- The vendor changed its remediation guidance.
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.
- Updated by Microsoft Security Response Center
The vendor changed the advisory after it was first published.
- Confirmed at the source
Our collector saw this advisory during a later source check.