Microsoft Office
CVE-2020-1493 — Microsoft Outlook Information Disclosure Vulnerability
Executive Summary
An information disclosure vulnerability exists when attaching files to Outlook messages. This vulnerability could potentially allow users to share attached files such that they are accessible by anonymous users where they should be restricted to specific users. To exploit this vulnerability, an attacker would have to attach a file as a link to an email. The email could then be shared with individuals that should not have access to the files, ignoring the default organizational setting. The security update addresses the vulnerability by correcting how Outlook handles file attachment links.
Overview
5.5
CVSS MEDIUM
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
EPSS Score
0.07296
probability of exploitation in the next 30 days
0.93577 percentile - updated 2026-06-21
View on FIRST.org
Affected Products
11 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft 365 Apps for Enterprise for 32-bit Systems | Click to Run (Security Update) |
Important | Information Disclosure | No |
| Microsoft 365 Apps for Enterprise for 64-bit Systems | Click to Run (Security Update) |
Important | Information Disclosure | No |
| 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 Outlook 2010 Service Pack 2 (32-bit editions) | 4484497 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Outlook 2010 Service Pack 2 (64-bit editions) | 4484497 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Outlook 2013 RT Service Pack 1 | 4484486 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Outlook 2013 Service Pack 1 (32-bit editions) | 4484486 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Outlook 2013 Service Pack 1 (64-bit editions) | 4484486 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Outlook 2016 (32-bit edition) | 4484475 (Security Update) |
Important | Information Disclosure | Maybe |
| Microsoft Outlook 2016 (64-bit edition) | 4484475 (Security Update) |
Important | Information Disclosure | Maybe |
Patches
4 patches
| Article | Type | Restart |
|---|---|---|
Click to Run |
Security Update | No |
4484497 |
Security Update | Maybe |
4484486 |
Security Update | Maybe |
4484475 |
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
References
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