Microsoft Office
CVE-2019-1446 — Microsoft Excel Information Disclosure Vulnerability
Executive Summary
An information disclosure vulnerability exists when Microsoft Excel improperly discloses the contents of its memory. An attacker who exploited the vulnerability could use the information to compromise the user’s computer or data. To exploit the vulnerability, an attacker could craft a special document file and then convince the user to open it. An attacker must know the memory address location where the object was created. The update addresses the vulnerability by changing the way certain Excel functions handle objects in memory.
Overview
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
EPSS Score
0.08357
probability of exploitation in the next 30 days
0.94244 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
23 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Excel Services on Microsoft SharePoint Server 2010 Service Pack 2 | 4484159 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Excel 2010 Service Pack 2 (32-bit editions) | 4484164 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Excel 2010 Service Pack 2 (64-bit editions) | 4484164 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Excel 2013 RT Service Pack 1 | 4484158 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Excel 2013 Service Pack 1 (32-bit editions) | 4484158 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Excel 2013 Service Pack 1 (64-bit editions) | 4484158 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Excel 2016 (32-bit edition) | 4484144 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Excel 2016 (64-bit edition) | 4484144 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Excel 2016 for Mac | Release Notes (Security Update) |
Important | Information Disclosure | No |
| Microsoft Office 2010 Service Pack 2 (32-bit editions) | 4484160 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Office 2010 Service Pack 2 (64-bit editions) | 4484160 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Office 2013 RT Service Pack 1 | 4484152 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Office 2013 Service Pack 1 (32-bit editions) | 4484152 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Office 2013 Service Pack 1 (64-bit editions) | 4484152 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Office 2016 (32-bit edition) | 4484148 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Office 2016 (64-bit edition) | 4484148 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Office 2019 for 32-bit editions | Click to Run (Security Update) |
Important | Information Disclosure | No |
| Microsoft Office 2019 for 64-bit editions | Click to Run (Security Update) |
Important | Information Disclosure | No |
| Microsoft Office 2019 for Mac | Release Notes (Security Update) |
Important | Information Disclosure | No |
| Microsoft Office Online Server | 4484141 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft SharePoint Enterprise Server 2013 Service Pack 1 | 4484151 (Security Update) |
Important | Information Disclosure | Maybe |
| Office 365 ProPlus for 32-bit Systems | Click to Run (Security Update) |
Important | Information Disclosure | No |
| Office 365 ProPlus for 64-bit Systems | Click to Run (Security Update) |
Important | Information Disclosure | No |
Patches
11 patches
| Article | Type | Restart |
|---|---|---|
4484159 |
Security Update | Maybe |
4484164 |
Security Update | Maybe |
4484158 |
Security Update | Maybe |
4484144 |
Security Update | Maybe |
Release Notes |
Security Update | No |
4484160 |
Security Update | Maybe |
4484152 |
Security Update | Maybe |
4484148 |
Security Update | Maybe |
Click to Run |
Security Update | No |
4484141 |
Security Update | Maybe |
4484151 |
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
Scott Brothers of Microsoft
References
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