CVE-2021-42292
Exploited in the Wild
✓ Confirmed 0-Day
★ Google Project Zero
Triaged: March 5, 2026
3 articles
EPSS Score
Source: FIRST.org · 2026-05-24
35.49%
probability
This CVE has a 35.49% probability
of being exploited in the next 30 days.
0%
Top 97.1th percentile of all CVEs
100%
CVSS score unavailable
Neither CIRCL nor NVD returned a CVSS score for this CVE.
View on VulnerabilityLookup ↗
Description
Project ZeroExcel security feature bypass
Google Project Zero
Patched
Nov. 9, 2021
Reported by
Microsoft Threat Intelligence Center (MSTIC)
Root Cause Analysis
???
Microsoft patches Excel zero-day used in attacks, asks Mac users to wait
BleepingComputer
Nov 10, 2021
Microsoft & Adobe Patch Tuesday (November 2021) – Microsoft 55 Vulnerabilities with 6 Critical, 6 Zero-Days. Adobe 4 Vulnerabilities
Qualys
Nov 11, 2021
Microsoft November 2021 Patch Tuesday fixes 6 zero-days, 55 flaws
BleepingComputer
Nov 09, 2021
Signal Intelligence
Confidence
95%
EPSS
35.49%
Mentions
3
Last Seen
Nov 11, 2021
CNA Information
Analyst Note
Auto-imported from Google Project Zero — confirmed zero-day by definition.
Threat Actors 2
Triage Info
Decided atMar 05, 2026