CVE-2021-42292 (GCVE-0-2021-42292)

Vulnerability from cvelistv5 – Published: 2021-11-10 00:47 – Updated: 2025-10-21 23:25
Title
Microsoft Excel Security Feature Bypass Vulnerability
Summary
Microsoft Excel Security Feature Bypass Vulnerability
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Microsoft Microsoft Office 2019 Affected: 19.0.0 , < https://aka.ms/OfficeSecurityReleases (custom)
    cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*
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Microsoft Microsoft Office 2019 for Mac Affected: 16.0.0 , < 16.55.21111400 (custom)
    cpe:2.3:a:microsoft:office:2019:*:*:*:*:macos:*:*
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Microsoft Microsoft 365 Apps for Enterprise Affected: 16.0.1 , < https://aka.ms/OfficeSecurityReleases (custom)
    cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*
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Microsoft Microsoft Office LTSC for Mac 2021 Affected: 16.0.1 , < 16.55.21111400 (custom)
    cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*
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Microsoft Microsoft Office LTSC 2021 Affected: 16.0.1 , < https://aka.ms/OfficeSecurityReleases (custom)
    cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:*:*:*
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Microsoft Microsoft Excel 2016 Affected: 16.0.0.0 , < 16.0.5239.1001 (custom)
    cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x86:*
    cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:*
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Microsoft Microsoft Office 2016 Affected: 16.0.0 , < 16.0.5239.1001 (custom)
    cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:x86:*
    cpe:2.3:a:microsoft:office:2016:*:*:*:*:*:x64:*
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Microsoft Microsoft Excel 2013 Service Pack 1 Affected: 15.0.0.0 , < 15.0.5397.1001 (custom)
    cpe:2.3:a:microsoft:excel:2013:sp1:*:*:rt:*:*:*
    cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:x86:*
    cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:x64:*
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Microsoft Microsoft Office 2013 Service Pack 1 Affected: 15.0.0 , < 15.0.5397.1001 (custom)
    cpe:2.3:a:microsoft:office:2013:sp1:*:*:rt:*:*:*
    cpe:2.3:a:microsoft:office:2013:sp1:*:*:*:*:x86:*
    cpe:2.3:a:microsoft:office:2013:sp1:*:*:*:*:x64:*
Create a notification for this product.
Date Public
2021-11-09 08:00
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2021-42292

Status: Confirmed

Status Updated: 2021-11-17 00:00 UTC

Exploited: Yes


Timestamps
First Seen: 2021-11-17
Asserted: 2021-11-17

Scope
Notes: KEV entry: Microsoft Excel Security Feature Bypass | Affected: Microsoft / Office | Description: A security feature bypass vulnerability in Microsoft Excel would allow a local user to perform arbitrary code execution. | Required action: Apply updates per vendor instructions. | Due date: 2021-12-01 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2021-42292

Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev


Details
Cwes CWE-357
Feed CISA Known Exploited Vulnerabilities Catalog
Product Office
Due Date 2021-12-01
Date Added 2021-11-17
Vendorproject Microsoft
Vulnerabilityname Microsoft Excel Security Feature Bypass
Knownransomwarecampaignuse Unknown

References

Created: 2026-02-02 12:28 UTC | Updated: 2026-02-06 07:17 UTC
KEVintel KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant

Vulnerability ID: CVE-2021-42292

Status: Confirmed

Status Updated: 2021-11-17 00:00 UTC

Exploited: Yes


Timestamps
First Seen: 2021-11-17
Asserted: 2021-11-17

Scope
Notes: KEVIntel entry: Microsoft Excel Security Feature Bypass Vulnerability | Affected: Microsoft / Microsoft Office 2019, Microsoft Office 2019 for Mac, Microsoft 365 Apps for Enterprise, Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC 2021, Microsoft Excel 2016, Microsoft Office 2016, Microsoft Excel 2013 Service Pack 1, Microsoft Office 2013 Service Pack 1 | CVSS: 7.8 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: False

Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel


Details
Feed KEVIntel (kevintel.com)
Title Microsoft Excel Security Feature Bypass Vulnerability
Vendor Microsoft
Product Microsoft Office 2019, Microsoft Office 2019 for Mac, Microsoft 365 Apps for Enterprise, Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC 2021, Microsoft Excel 2016, Microsoft Office 2016, Microsoft Excel 2013 Service Pack 1, Microsoft Office 2013 Service Pack 1
Added Date 2021-11-17T00:00:00.000Z
Cvss Score 7.8
Epss Score None
Cvss Severity HIGH
Epss Percentile None
Used In Malware unknown
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False

References

Created: 2026-06-19 12:47 UTC | Updated: 2026-06-19 12:47 UTC
Show details on NVD website

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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Detection rules are retrieved from Rulezet.

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