All vulnerabilities
CVE-2021-21220

Google Chromium V8 Improper Input Validation Vulnerability

Google Chromium V8Applications & CMS
Open in ThreatlineRecord JSON
CVSS
8.8High
ExploitationExploited in the wildAdded to KEV 3 Nov 2021CISA KEV
Exploit odds (EPSS)70.4%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in89.0.4389.128Fixed versionCVE List
Federal deadline17 Nov 2021Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 13 Apr 2021Exploit code publicMetasploit
  2. 26 Apr 2021, 00:00 UTCPublishedCVE List
  3. 3 Nov 2021Added to CISA KEVCISA KEV

Public exploit code and templates 1

  • Exploit moduleGoogle Chrome versions before 89.0.4389.128 V8 XOR Typer Out-Of-Bounds Access RCE 13 Apr 2021Metasploit

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

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.

Text from CVE List

Affected versions 1

  • Chromeaffected: unspecified before 89.0.4389.128CVE List

References 8