CVE-2021-42292 kev in the critical feed json
Microsoft Excel Security Feature Bypass Vulnerability
published 2021-11-10 4 y ago modified 2026-08-19 2 mo ago also EUVD-2021-29267
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Exploited
- added 2021-11-17
- epss
- 43.0%
- EPSS 43.0% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
Microsoft Excel Security Feature Bypass Vulnerability
Patch / fix
cisa required action Apply updates per vendor instructions.
- Microsoft Microsoft Excel 2013 Service Pack 1 15.0.5397.1001
- Microsoft Microsoft Excel 2016 16.0.5239.1001
- Microsoft Microsoft Office 2013 Service Pack 1 15.0.5397.1001
- Microsoft Microsoft Office 2016 16.0.5239.1001
- Microsoft Microsoft Office 2019 for Mac 16.55.21111400
- Microsoft Microsoft Office LTSC for Mac 2021 16.55.21111400
Timeline
- 0-day patched (Project Zero)
- Published
- Added to CISA KEV
- CISA patch deadline
- CISA SSVC: exploitation active
Known exploited
- Added
- 4 y ago
- Patch by
- 2021-12-01 (4 y ago)
- Ransomware
- Not known
- Required action
- Apply updates per vendor instructions.
- Vendor, product
- Microsoft, Office
- CISA name
- Microsoft Excel Security Feature Bypass
Zero-day
Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.
- Patched
- 2021-11-09
- Details
- project zero tracker
CISA SSVC
- Exploitation
- Active, exploited in the wild
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 y ago
Exploit prediction
43.00% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | 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 | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Affected products
- Microsoft Microsoft 365 Apps for Enterprise
- Microsoft Microsoft Excel 2013 Service Pack 1
- Microsoft Microsoft Excel 2016
- Microsoft Microsoft Office 2013 Service Pack 1
- Microsoft Microsoft Office 2016
- Microsoft Microsoft Office 2019
- Microsoft Microsoft Office 2019 for Mac
- Microsoft Microsoft Office LTSC 2021
- Microsoft Microsoft Office LTSC for Mac 2021
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2021-42292
vendor-advisory, patch
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2021-42292
patch, vendor-advisory
-
cisa.gov
/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42292
government-resource, us-government-resource
Sources
- CVE List CVE-2021-42292
- NVD CVE-2021-42292
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