CVE-2021-21148
Google Chromium V8 Heap Buffer Overflow Vulnerability
- Published
- Feb 9, 2021
- Updated
- Oct 21, 2025
- Assigning CNA
- Chrome
- Evidence observed
- Nov 3, 2021
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HModerate · next 30 days
- Percentile
- 97.4%
- Model date
- Oct 18, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
Heap buffer overflow in V8 in Google Chrome prior to 88.0.4324.150 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.
Sources
Proof-of-concept exploit for CVE-2021-21148, a Google Chrome vulnerability. Executes the exploit with a single command for testing and validation purposes.
Responsible use
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