Microsoft Office
CVE-2019-0540 — Microsoft Office Security Feature Bypass Vulnerability
Executive Summary
A security feature bypass vulnerability exists when Microsoft Office does not validate URLs. An attacker could send a victim a specially crafted file, which could trick the victim into entering credentials. An attacker who successfully exploited this vulnerability could perform a phishing attack. The update addresses the vulnerability by ensuring Microsoft Office properly validates URLs.
Overview
Important
MS Severity
Not Exploited
MS Exploit Status
More Likely
MS Exploit Likelihood
EPSS Score
0.12783
probability of exploitation in the next 30 days
0.95773 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
15 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft Excel Viewer | 4092465 (Security Update) |
Important | Security Feature Bypass | Maybe |
| Microsoft Office 2010 Service Pack 2 (32-bit editions) | 4462174 (Security Update) |
Important | Security Feature Bypass | Maybe |
| Microsoft Office 2010 Service Pack 2 (64-bit editions) | 4462174 (Security Update) |
Important | Security Feature Bypass | Maybe |
| Microsoft Office 2013 RT Service Pack 1 | 4462138 (Security Update) |
Important | Security Feature Bypass | Maybe |
| Microsoft Office 2013 Service Pack 1 (32-bit editions) | 4462138 (Security Update) |
Important | Security Feature Bypass | Maybe |
| Microsoft Office 2013 Service Pack 1 (64-bit editions) | 4462138 (Security Update) |
Important | Security Feature Bypass | Maybe |
| Microsoft Office 2016 (32-bit edition) | 4462146 (Security Update) |
Important | Security Feature Bypass | Maybe |
| Microsoft Office 2016 (64-bit edition) | 4462146 (Security Update) |
Important | Security Feature Bypass | Maybe |
| 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 |
| Microsoft Office Compatibility Pack Service Pack 3 | 4092465 (Security Update) |
Important | Security Feature Bypass | Maybe |
| Microsoft Office Word Viewer | 4462154 (Security Update) |
Important | Security Feature Bypass | Maybe |
| Microsoft PowerPoint Viewer | 4092465 (Security Update) |
Important | Security Feature Bypass | Maybe |
| 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
6 patches
| Article | Type | Restart |
|---|---|---|
4092465 |
Security Update | Maybe |
4462174 |
Security Update | Maybe |
4462138 |
Security Update | Maybe |
4462146 |
Security Update | Maybe |
Click to Run |
Security Update | No |
4462154 |
Security Update | Maybe |
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
Pieter Ceelen & Stan Hegt of Outflank, David ROUTIN
References
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