CVE-2021-21220: Google Chromium V8 Improper Input Validation Vulnerability

CVE-2021-21220 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2021-11-03

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 flaw can lead to arbitrary code execution within the context of the browser process.

Technologies: Google Chromium V8. Vendors: Google.

Quick answers

Is CVE-2021-21220 exploited in the wild?
Yes. CVE-2021-21220 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2021-21220?
Critical severity, with a CVSS score of 8.8, published 3 November 2021.
Which products and versions are affected?
Google Chrome prior to 89.0.4389.128; Google V8 prior to 89.0.4389.128; Microsoft Edge; Opera Software Opera.
Is there a fix for CVE-2021-21220?
A patch was published on 2021-04-13: Stable Channel Update for Desktop 89.0.4389.128 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2021-21220 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2021-21220?
Check whether you run Google Chromium V8. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Google Chrome prior to 89.0.4389.128
  • Google V8 prior to 89.0.4389.128
  • Microsoft Edge
  • Opera Software Opera

Timeline

  • 2021-04-13: patched: Stable Channel Update for Desktop 89.0.4389.128
  • 2021-11-03: disclosed: Published in NVD
  • 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2021-11-03: exploited: Confirmed exploited in the wild per CISA KEV catalog entry date.

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.