CVE-2021-21181
✓ Confirmed 0-Day
Triaged: March 20, 2026
2 articles
EPSS Score
Source: FIRST.org · 2026-05-24
1.36%
probability
This CVE has a 1.36% probability
of being exploited in the next 30 days.
0%
Top 80.4th percentile of all CVEs
100%
CVSS score unavailable
Neither CIRCL nor NVD returned a CVSS score for this CVE.
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Attack Intelligence
Google fixes second actively exploited Chrome zero-day bug this year
BleepingComputer
Mar 02, 2021
Microsoft March 2021 Patch Tuesday fixes 82 flaws, 2 zero-days
BleepingComputer
Mar 09, 2021
Signal Intelligence
Confidence
85%
EPSS
1.36%
Mentions
2
Last Seen
Mar 09, 2021
CNA Information
Analyst Note
Article [1] explicitly names this CVE as an 'actively exploited Chrome zero-day bug' fixed by Google in 2021, indicating exploitation preceded or coincided with patch availability. The CVE year (2021) aligns with the patch timing, and active exploitation is directly confirmed.
Triage Info
Decided atMar 20, 2026