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CVE-2021-21220: Google Chromium V8 Improper Input Validation Vulnerability
Google Chromium V8 · in CISA KEV since 2021-11-03
2021-11-03added to KEV
2021-11-17federal remediation due date
70.44%EPSS exploit probability (30 days) 99.4th percentile
8.8 HIGHCVSS 3.1
Unknownknown ransomware use
191days from NVD publication to KEV
What it is
Google Chromium V8 Engine contains an improper input validation vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | CWE-20;CWE-122 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD published | 2021-04-26 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-21220.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.