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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Microsoft Microsoft Office 2019
19.0.0 to < https://aka.ms/OfficeSecurityReleasesaffected
Microsoft Microsoft 365 Apps for Enterprise
16.0.1 to < https://aka.ms/OfficeSecurityReleasesaffected
Microsoft Microsoft Outlook 2016
16.0.0.0 to < publicationaffected
Microsoft Microsoft Outlook 2013 Service Pack 1
15.0.0.0 to < publicationaffected
Microsoft Microsoft Outlook 2010 Service Pack 2
13.0.0.0 to < publicationaffected