CVE record · CVE-2021-42292

Microsoft Excel Security Feature Bypass Vulnerability

CVSS 7.8 HighCriticalIn CISA KEVEPSS 0.43 · 98th percentile

Critical, because:

In CISA’s KEV catalogue since 17 Nov 2021: it is known to be exploited.
CVSS score 7.8 (7.0 or more) and EPSS 0.43 (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 10 Nov 2021, 00:47 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 Excel 2013 Service Pack 1	affected 15.0.0.0 to before 15.0.5397.1001 custom
Microsoft	Microsoft Excel 2016	affected 16.0.0.0 to before 16.0.5239.1001 custom
Microsoft	Microsoft Office 2013 Service Pack 1	affected 15.0.0 to before 15.0.5397.1001 custom
Microsoft	Microsoft Office 2016	affected 16.0.0 to before 16.0.5239.1001 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 16.55.21111400 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 16.55.21111400 custom

Identifiers: CVE-2021-42292
CNA: microsoft
Tags: Microsoft 365 Apps for Enterprise
Microsoft Excel 2013 Service Pack 1
Microsoft Excel 2016
Microsoft Office 2013 Service Pack 1
Microsoft Office 2016
Microsoft Office 2019
Microsoft Office 2019 for Mac
Microsoft Office LTSC 2021
Published: 10 Nov 2021
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
7.8	High	3.1	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C	CNA (microsoft)

CISA KEV Listed since 17 Nov 2021: known to be exploited.
EPSS 0.43, the 98th 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 10 Nov 2021. New records show when each source confirmed them.

Sources

References from the CNA

msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42292 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.