CVE-2023-21716: Microsoft Word Remote Code Execution Vulnerability

In plain English

A critical-severity integer overflow in Microsoft 365 Apps for Enterprise from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 84.8% (higher than 99.7% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Microsoft Word Remote Code Execution Vulnerability

Affected products (as reported)

Vendor	Product	Versions
Microsoft	Microsoft 365 Apps for Enterprise	16.0.1 – before https://aka.ms/OfficeSecurityReleases
Microsoft	Microsoft Office 2019	19.0.0 – before https://aka.ms/OfficeSecurityReleases
Microsoft	Microsoft Office 2019 for Mac	16.0.0 – before 16.70.23021201
Microsoft	Microsoft Office LTSC 2021	16.0.1 – before https://aka.ms/OfficeSecurityReleases
Microsoft	Microsoft Office LTSC for Mac 2021	16.0.1 – before 16.70.23021201
Microsoft	Microsoft Office Online Server	16.0.1 – before 16.0.10395.20001
Microsoft	Microsoft Office Web Apps Server 2013 Service Pack 1	15.0.1 – before 15.0.5529.1000
Microsoft	Microsoft SharePoint Enterprise Server 2013 Service Pack 1	15.0.0 – before 15.0.5529.1000
Microsoft	Microsoft SharePoint Enterprise Server 2016	16.0.0 – before 16.0.5383.1000
Microsoft	Microsoft SharePoint Foundation 2013 Service Pack 1	15.0.0 – before 15.0.5529.1000
Microsoft	Microsoft SharePoint Server 2019	16.0.0 – before 16.0.10395.20001
Microsoft	Microsoft SharePoint Server Subscription Edition	16.0.0 – before 16.0.15601.20478
Microsoft	Microsoft Word 2013 Service Pack 1	15.0.1 – before 15.0.5529.1000
Microsoft	Microsoft Word 2013 Service Pack 1	15.0.1 – before 15.0.5529.1000
Microsoft	Microsoft Word 2016	16.0.1 – before 16.0.5383.1000
Microsoft	SharePoint Server Subscription Edition Language Pack	16.0.0 – before 16.0.15601.20478

Vendor

Product

Versions

In plain English

Official description

Affected products (as reported)

References