ReviewHigh

CVE-2021-34452

Microsoft Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Word 2016

CVE-2021-34452 affects Microsoft Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Word 2016. Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

CVSS
7.8
EPSS
2.21%
81.4% percentile
CISA KEV
Not listed
Published
2021.07.17
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability2.21%
Technical severityCVSS 7.8

Vulnerability overview

CVE-2021-34452 affects Microsoft Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Word 2016. Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

Affected product and versions

Product
Microsoft Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Word 2016
Affected versions
>= 16.0.1 < https://aka.ms/OfficeSecurityReleases, >= 19.0.0 < https://aka.ms/OfficeSecurityReleases, >= 16.0.1 < 16.0.5188.1000, 2019, 2016
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. 1
    Identify

    Confirm that Microsoft Microsoft 365 Apps for Enterprise, Microsoft Office 2019, Microsoft Word 2016 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
Not available