CVE-2026-55133ImportantMonitor
Microsoft OneNote Remote Code Execution Vulnerability
Severity Important · Urgency Monitor
Why it matters: Important severity (CVSS 7.8)
Remote Code Execution · Important · CVSS 7.8. Affects: Microsoft 365 Apps, Microsoft Office 365 for Mac, Microsoft Office LTSC for Mac.
Affected: Microsoft 365 Apps, Microsoft Office 365 for Mac, Microsoft Office LTSC for Mac