CVE Watch—

CVE-2021-21220

Google Chromium V8 Improper Input Validation Vulnerability

CVSS

—

No CVSS

EPSS

70.4%

p99

KEV

YES

Nov 3, 2021

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

70.4%EPSS · 30 days70.4%

2026-06-302026-07-16

KEV catalog record

Product

Google / Chromium V8

Vulnerability

Google Chromium V8 Improper Input Validation Vulnerability

Added to KEV

Nov 3, 2021

Remediate by

Nov 17, 2021

Known ransomware use

Summary description

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

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2021-21220

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

CVE-2018-17463—

99.7%

KEV—80Google Chromium V8 Remote Code Execution Vulnerability—CVE-2020-6418—

99.5%

KEV—80Google Chromium V8 Type Confusion Vulnerability—CVE-2021-30632—

99.2%

KEV—80Google Chromium V8 Out-of-Bounds Write Vulnerability—CVE-2021-30551—

99.2%

KEV—80Google Chromium V8 Type Confusion Vulnerability—CVE-2018-6065—

99.0%

KEV—80Google Chromium V8 Integer Overflow Vulnerability—CVE-2021-21224—

99.0%

KEV—80Google Chromium V8 Type Confusion Vulnerability—