Is It On KEV?

Microsoft Office

YES - ON THE CISA KEV LIST
CVE-2021-42292

Microsoft Excel Security Feature Bypass

CISA catalog due date2021-12-01
overdue since 2021-12-01
EPSS exploit probability (next 30 days)43.0% · 99percentile
From CVE publication to KEV listing7 days (2021-11-10 → 2021-11-17)
Remediation window (KEV listing to due date)14 days
Days on the KEV list1820 days
Date added to KEV2021-11-17
Known ransomware campaign useUnknown
VendorMicrosoft
ProductOffice
Weaknesses (CWE)CWE-357

Microsoft: 391 entries (22.0% of all KEV entries are from this vendor); 41 added in 2026.

BOD 26-04 note: this is the date printed in the CISA catalog. A federal agency's actual deadline is set by its SSVC tier - Act (3 days), Attend (14 days), Track (60 days), or the next scheduled upgrade - counted from the KEV listing date or the date the vulnerability is identified in its environment, whichever comes first. Use the tier helper on each CVE page for your own window.

Your BOD 26-04 window (SSVC tier helper)

Your remediation window ends:

Description

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

Required action (CISA)

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2021-42292

References

Other KEV entries for this vendor: Microsoft

Microsoft - Vendors with KEV entries

Go deeper

KEV deadlines are a governance problem as much as a patching one. TrebSec's AI governance packs help small teams document, assign, and evidence exactly this work.

AI Governance Policy Pack - $79 AI Vendor Workbook - $49 Both packs bundled - $99

Daily threat briefs at trebsec.com

Check another CVE