What’s Vulnerable › Vulnerabilities
CVE-2021-42292: Microsoft Excel Security Feature Bypass Vulnerability
- Severity: medium (CVSS 6.8 v2.0)
- Exploited in the wild: yes — in CISA KEV since 2021-11-17
- EPSS: 43.0% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-11-10 · updated 2026-08-19
Description
Microsoft Excel Security Feature Bypass Vulnerability
Affected products
- Microsoft 365 Apps: all versions
- Microsoft Excel 2013 Service Pack 1: 2013-sp1, 2016
- Microsoft Office: 2013-sp1, 2019
- Microsoft Office 2016: all versions
- Microsoft Office 2019: all versions
- Microsoft Office 2021: all versions
- Microsoft 365 Apps: from 16.0.1 before https://aka.ms/OfficeSecurityReleases — fixed in https://aka.ms/OfficeSecurityReleases
- Microsoft Excel 2013 Service Pack 1: from 15.0.0.0 before 15.0.5397.1001 — fixed in 15.0.5397.1001
- Microsoft Excel 2016: from 16.0.0.0 before 16.0.5239.1001 — fixed in 16.0.5239.1001
- Microsoft Office 2013 Service Pack 1: from 15.0.0 before 15.0.5397.1001 — fixed in 15.0.5397.1001
- Microsoft Office 2019 for Mac: from 16.0.0 before 16.55.21111400 — fixed in 16.55.21111400
- Microsoft Office LTSC 2021: from 16.0.1 before https://aka.ms/OfficeSecurityReleases — fixed in https://aka.ms/OfficeSecurityReleases
- Microsoft Office: from 16.0.0 before 16.0.5239.1001 — fixed in 16.0.5239.1001
- Microsoft Office LTSC for Mac 2021: from 16.0.1 before 16.55.21111400 — fixed in 16.55.21111400
How to fix
Upgrade to a fixed version: Microsoft 365 Apps https://aka.ms/OfficeSecurityReleases; Microsoft Excel 2013 Service Pack 1 15.0.5397.1001; Microsoft Excel 2016 16.0.5239.1001; Microsoft Office 2013 Service Pack 1 15.0.5397.1001; Microsoft Office 2019 for Mac 16.55.21111400; Microsoft Office LTSC 2021 https://aka.ms/OfficeSecurityReleases; Microsoft Office 16.0.5239.1001; Microsoft Office LTSC for Mac 2021 16.55.21111400. Check the vendor advisory for mitigations.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-42292
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-42292
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42292
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