CVE-2021-30523
CVSS v3
8.8
HIGH
EPSS Score
1.1 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
Use after free in WebRTC in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to potentially exploit heap corruption via a crafted SCTP packet.
Technical details
- Published
- 2021-06-07
Frequently asked questions
What is CVE-2021-30523?
Use after free in WebRTC in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to potentially exploit heap corruption via a crafted SCTP packet.
Is CVE-2021-30523 actively exploited?
Active exploitation of CVE-2021-30523 has not been confirmed. Its EPSS score was 1.1% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-30523?
CVE-2021-30523 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2021-30523 affecting your environment?
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