Microsoft Office
CVE-2019-1449 — Microsoft Office ClickToRun Security Feature Bypass Vulnerability
Executive Summary
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. The security update addresses how C2R components handle these files.
Overview
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
EPSS Score
0.06363
probability of exploitation in the next 30 days
0.92761 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
4 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft Office 2019 for 32-bit editions | Click to Run (Security Update) |
Important | Security Feature Bypass | No |
| Microsoft Office 2019 for 64-bit editions | Click to Run (Security Update) |
Important | Security Feature Bypass | No |
| Office 365 ProPlus for 32-bit Systems | Click to Run (Security Update) |
Important | Security Feature Bypass | No |
| Office 365 ProPlus for 64-bit Systems | Click to Run (Security Update) |
Important | Security Feature Bypass | No |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
Click to Run |
Security Update | No |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
Ben Faull of Microsoft Corporation
References
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