CVE-2020-1493

Microsoft Outlook Information Disclosure Vulnerability

MEDIUM
5.5
CVSS Score
Published: August 17, 2020 at 12:00 AM UTC
Updated: June 17, 2026 at 03:01 AM UTC
4 products affected across 1 vendorOffice365 AppsOutlook

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Severity
MEDIUM5.5
Exploit prediction
EPSS 7%
SSVC
PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

16.0.1 ≤ v < https://aka.ms/OfficeSecurityReleases16.0.1
Affected range stops below https://aka.ms/OfficeSecurityReleases, so it looks safe — our inference, not a vendor statement
13.0.0.0 ≤ v < publication15.0.0.0 ≤ v < publication16.0.0.0 ≤ v < publication13.0.0.015.0.0.016.0.0.020102010 sp220132013 sp12016
Affected range stops below publication, so it looks safe — our inference, not a vendor statement
19.0.0 ≤ v < https://aka.ms/OfficeSecurityReleases19.0.0
Affected range stops below https://aka.ms/OfficeSecurityReleases, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfoCWE-922

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