CVE record · CVE-2023-21716

Microsoft Word Remote Code Execution Vulnerability

CVSS 9.8 CriticalCriticalEPSS 0.85 · 99th percentile

Critical, because:

CVSS score 9.8: 9.0 or more.
CVSS score 9.8 (7.0 or more) and EPSS 0.85 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

Published by the CVE Program (CNA: microsoft) at 14 Feb 2023, 19:33 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Microsoft	Microsoft 365 Apps for Enterprise	affected 16.0.1 to before https://aka.ms/OfficeSecurityReleases custom
Microsoft	Microsoft Office 2019	affected 19.0.0 to before https://aka.ms/OfficeSecurityReleases custom
Microsoft	Microsoft Office 2019 for Mac	affected 16.0.0 to before 16.70.23021201 custom
Microsoft	Microsoft Office LTSC 2021	affected 16.0.1 to before https://aka.ms/OfficeSecurityReleases custom
Microsoft	Microsoft Office LTSC for Mac 2021	affected 16.0.1 to before 16.70.23021201 custom
Microsoft	Microsoft Office Online Server	affected 16.0.1 to before 16.0.10395.20001 custom
Microsoft	Microsoft Office Web Apps Server 2013 Service Pack 1	affected 15.0.1 to before 15.0.5529.1000 custom
Microsoft	Microsoft SharePoint Enterprise Server 2013 Service Pack 1	affected 15.0.0 to before 15.0.5529.1000 custom
Microsoft	Microsoft SharePoint Enterprise Server 2016	affected 16.0.0 to before 16.0.5383.1000 custom
Microsoft	Microsoft SharePoint Foundation 2013 Service Pack 1	affected 15.0.0 to before 15.0.5529.1000 custom
Microsoft	Microsoft SharePoint Server 2019	affected 16.0.0 to before 16.0.10395.20001 custom
Microsoft	Microsoft SharePoint Server Subscription Edition	affected 16.0.0 to before 16.0.15601.20478 custom
Microsoft	Microsoft Word 2013 Service Pack 1	affected 15.0.1 to before 15.0.5529.1000 custom
Microsoft	Microsoft Word 2013 Service Pack 1	affected 15.0.1 to before 15.0.5529.1000 custom
Microsoft	Microsoft Word 2016	affected 16.0.1 to before 16.0.5383.1000 custom
Microsoft	SharePoint Server Subscription Edition Language Pack	affected 16.0.0 to before 16.0.15601.20478 custom

Identifiers: CVE-2023-21716
CNA: microsoft
Weakness (CWE): CWE-190
Tags: Microsoft 365 Apps for Enterprise
Microsoft Office 2019
Microsoft Office 2019 for Mac
Microsoft Office LTSC 2021
Microsoft Office LTSC for Mac 2021
Microsoft Office Online Server
Microsoft Office Web Apps Server 2013 Service Pack 1
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
Memory corruption
Published: 14 Feb 2023
Updated: 19 Aug 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.8	Critical	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	CNA (microsoft)

CISA KEV Not listed.
EPSS 0.85, the 99th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 14 Feb 2023. New records show when each source confirmed them.

Sources

References from the CNA

msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21716 vendor-advisorypatch

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.