CVE-2021-30561
CVSS v3
8.8
HIGH
EPSS Score
4.7 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Technical details
- Published
- 2021-08-03
Frequently asked questions
What is CVE-2021-30561?
Type Confusion in V8 in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Is CVE-2021-30561 actively exploited?
Active exploitation of CVE-2021-30561 has not been confirmed. Its EPSS score was 4.7% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-30561?
CVE-2021-30561 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2021-30561 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.
No credit card required · 500 free checks/month · Free API key
Other 2021 vulnerabilities worth triaging
Ranked by exploit probability (EPSS).