CVE-2021-42292 (GCVE-0-2021-42292)
Vulnerability from cvelistv5 – Published: 2021-11-10 00:47 – Updated: 2026-08-19 16:27Title
Microsoft Excel Security Feature Bypass Vulnerability
Summary
Microsoft Excel Security Feature Bypass Vulnerability
Severity
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-01-03 16:41 UTC
CWE
- Security Feature Bypass
- CWE-noinfo Not enough information
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
| https://portal.msrc.microsoft.com/en-US/security-… | x_refsource_MISCx_transferred |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
9 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
guessed | |
| Microsoft | Microsoft Excel 2013 Service Pack 1 |
Affected:
15.0.0.0 , < 15.0.5397.1001
(custom)
|
guessed | |
| Microsoft | Microsoft Excel 2016 |
Affected:
16.0.0.0 , < 16.0.5239.1001
(custom)
|
guessed | |
| Microsoft | Microsoft Office 2013 Service Pack 1 |
Affected:
15.0.0 , < 15.0.5397.1001
(custom)
|
guessed | |
| Microsoft | Microsoft Office 2016 |
Affected:
16.0.0 , < 16.0.5239.1001
(custom)
|
guessed | |
| Microsoft | Microsoft Office 2019 |
Affected:
19.0.0 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
guessed | |
| Microsoft | Microsoft Office 2019 for Mac |
Affected:
16.0.0 , < 16.55.21111400
(custom)
|
guessed | |
| Microsoft | Microsoft Office LTSC 2021 |
Affected:
16.0.1 , < https://aka.ms/OfficeSecurityReleases
(custom)
|
guessed | |
| Microsoft | Microsoft Office LTSC for Mac 2021 |
Affected:
16.0.1 , < 16.55.21111400
(custom)
|
guessed |
Date Public
2021-11-09 08:00
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 0f3be1c5-0396-4f99-b0d9-f954e7347e82
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 13:26 UTC
| Updated: 2026-02-06 07:53 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 944629a1-0706-4fba-a50c-74436e394b5f
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: 2026-06-23 11:13 UTC
| Updated: 2026-06-23 11:13 UTC
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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