CVE-2021-21206: Google Chromium Blink Use-After-Free Vulnerability

CVE-2021-21206 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2021-11-03

A use-after-free vulnerability in the Blink engine of Google Chromium allows remote attackers to execute arbitrary code or cause heap corruption via a specially crafted HTML page. This vulnerability was exploited in the wild prior to being patched.

Vendors: Google.

Quick answers

Is CVE-2021-21206 exploited in the wild?
Yes. CVE-2021-21206 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2021-21206?
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; Microsoft Edge; Opera Opera.
Is there a fix for CVE-2021-21206?
A patch was published on 2021-04-13: Chrome stable channel update 89.0.4389.128 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2021-21206 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2021-21206?
Check whether you run Google Chromium Blink. 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
  • Microsoft Edge
  • Opera Opera

Timeline

  • 2021-04-13: patched: Chrome stable channel update 89.0.4389.128 released
  • 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2021-11-03: disclosed

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