CVE-2019-1449: Microsoft Office

Critical severity, CVSS 9.8. EPSS: 6.8% chance of exploitation in the next 30 days.

A security feature bypass vulnerability exists in the way that Office Click-to-Run (C2R) components handle a specially crafted file, which could lead to a standard user, any AppContainer sandbox, and Office LPAC Protected View to escalate privileges to SYSTEM.To exploit this bug, an attacker would have to run a specially crafted file, aka 'Microsoft Office ClickToRun Security Feature Bypass Vulnerability'.

Affected products

• Microsoft Office: version 2019 only
• Microsoft Office 365 Proplus: affected versions not specified

Published 2019-11-12. Last modified 2026-06-17.