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Vulnerabilities

Vulnerability · CVE-2021-42292

Microsoft Excel Security Feature Bypass

Published Nov 9, 2021 · catalog updated Aug 19, 2026 · Microsoft Office

Patch now

CVE-2021-42292 is in the CISA known-exploited catalog, due Dec 1, 2021. Confirm Microsoft Office against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
High7.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
43.00%
Remediation
Remediation guidance
Affected products
cpe microsoft/365 apps · cpe microsoft/excel · cpe microsoft/office · vendor Microsoft Office

A security feature bypass vulnerability in Microsoft Excel would allow a local user to perform arbitrary code execution.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe microsoft/365 appsversion unspecified
  • cpe microsoft/excel2013
  • cpe microsoft/excel2016
  • cpe microsoft/office2013
  • cpe microsoft/office2019
  • vendor Microsoft Officeversion unspecified

How to fix CVE-2021-42292

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-42292 is in the CISA known-exploited catalog, due Dec 1, 2021. Confirm Microsoft Office against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with 2013, 2016, 2019. Apply updates per vendor instructions.

What should an analyst verify?

CWE-357. EPSS 43.00%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 9, 2021 · Catalog

    Detected

    A security feature bypass vulnerability in Microsoft Excel would allow a local user to perform arbitrary code execution.

  2. Nov 17, 2021 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Dec 1, 2021 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Aug 19, 2026 · Catalog

    Updated

    A security feature bypass vulnerability in Microsoft Excel would allow a local user to perform arbitrary code execution.

Sources

  • CISA KEVConfirmed exploitationCVE-2021-42292

    A security feature bypass vulnerability in Microsoft Excel would allow a local user to perform arbitrary code execution.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2021-42292

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-42292

    30-day exploitation probability 43.0%

    first.org
  • NIST NVDVulnerability recordCVE-2021-42292

    Microsoft Excel Security Feature Bypass Vulnerability

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2021-42292

    A security feature bypass vulnerability in Microsoft Excel would allow a local user to perform arbitrary code execution.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.