Priority reviewCritical

CVE-2023-21716

Microsoft Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Office 2019 for Mac

CVE-2023-21716 affects Microsoft Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Office 2019 for Mac. Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

CVSS: 9.8
EPSS: 82.3%
CISA KEV: Not listed
Published: 2023.02.15

PRIORITY ASSESSMENT

Priority review

FIRST EPSS indicates an elevated probability of exploitation.

Known exploitationNot established by KEV

Exploit probability82.3%

Technical severityCVSS 9.8

Vulnerability overview

Affected product and versions

Product: Microsoft Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Office 2019 for Mac
Affected versions: >= 16.0.1 < https://aka.ms/OfficeSecurityReleases, >= 19.0.0 < https://aka.ms/OfficeSecurityReleases, >= 16.0.0 < 16.70.23021201, >= 16.0.1 < 16.70.23021201, >= 16.0.1 < 16.0.10395.20001, >= 15.0.1 < 15.0.5529.1000, >= 15.0.0 < 15.0.5529.1000, >= 16.0.0 < 16.0.5383.1000, >= 16.0.0 < 16.0.10395.20001, >= 16.0.0 < 16.0.15601.20478, >= 16.0.1 < 16.0.5383.1000, 2019, 2021, 2016, 2013
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Microsoft Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Office 2019 for Mac and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-190