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September 14, 2021 |

Chrome security updates fix actively exploited flaws

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On 13 September 2021, Google released Chrome 93.0.4577.82 for Windows, Mac, and Linux to fix 11 security vulnerabilities. We recommend updating to the latest version of Chrome as soon as possible.


  • The latest Chrome version fixes two high-severity vulnerabilities being leveraged by threat actors.
    • One flaw, tracked as CVE-2021-30632, causes a boundary error when processing untrusted HTML content in V8.
    • V8 is an open-source JavaScript engine developed by the Chromium Project for Google Chrome and other Chromium-based web browsers, including Brave, Opera, Vivaldi and Microsoft Edge. V8 is also integrated into various independent projects; among them are Couchbase database server, Node.js runtime environment, and Electron desktop application framework. This flaw was also fixed in Microsoft Edge. Other V8-based browsers may be vulnerable.
    • The second issue, tracked as CVE-2021-30633, is a memory corruption bug that exists due to a use-after-free (UAF) error within the Indexed DB API component in Google Chrome.
  • Successful exploitation of these flaws requires a user running unpatched Chrome versions to visit a web page specially crafted by a threat actor. This would enable the actor to trigger remote code execution, denial of service or security restriction bypass on a vulnerable system.
  • The new version has started rolling out worldwide and will become available to all users over the next few days.


  • Windows, Mac, and Linux desktop users can manually upgrade to the latest Chrome version by going to Settings -> Help -> About Google Chrome.
  • The Google Chrome web browser will then automatically check for the new update and install it if available.
  • We recommend notifying users of this risk and requesting that they restart their browser to ensure the needed security patches are applied.
  • If software is managed centrally within your organization, we recommend updating this software as soon as possible.