CVE-2021-21225
✓ Confirmed 0-Day
Triaged: March 20, 2026
1 article
EPSS Score
Source: FIRST.org · 2026-05-24
1.82%
probability
This CVE has a 1.82% probability
of being exploited in the next 30 days.
0%
Top 83.1th percentile of all CVEs
100%
CVSS score unavailable
Neither CIRCL nor NVD returned a CVSS score for this CVE.
View on VulnerabilityLookup ↗
Attack Intelligence
Google fixes exploited Chrome zero-day dropped on Twitter last week
BleepingComputer
Apr 21, 2021
Signal Intelligence
Confidence
85%
EPSS
1.82%
Mentions
1
Last Seen
Apr 21, 2021
CNA Information
Analyst Note
BleepingComputer headline explicitly states this is an 'exploited Chrome zero-day dropped on Twitter last week,' confirming in-the-wild exploitation. The 2021 CVE year combined with a Google fix announcement indicates exploitation occurred before or concurrent with patching. High confidence despite limited article data due to explicit zero-day language in authoritative source.
Triage Info
Decided atMar 20, 2026