Google relesead an updated that addresses a critical vulnerability in Google Chrome version 66 and that could be exploited by crooks to take over a system.

Google released an updated version of Google Chrome version 66.0.3359.170 for Windows, Mac, and Linux systems that addressed 4 security vulnerabilities.

“This update includes 4 security fixes. Below, we highlight fixes that were contributed by external researchers. Please see the Chrome Security Page for more information.” reads the post published by Google.

  • [835887] Critical: Chain leading to sandbox escape. Reported by Anonymous on 2018-04-23:
  • [836858] High CVE-2018-6121: Privilege Escalation in extensions.
  • [836141] High CVE-2018-6122: Type confusion in V8.
  • [$5000][833721] High CVE-2018-6120: Heap buffer overflow in PDFium. Reported by Zhou Aiting(@zhouat1) of Qihoo 360 Vulcan Team on 2018-04-17″


Three vulnerabilities were reported by external security researchers. The most critical issues are related to privilege escalation in extensions tracked as CVE-2018-6121 and a type confusion in V8 tracked as CVE-2018-6122.

Chrome addressed the CVE-2018-6120 heap buffer overflow in PDFium reported by Zhou Aiting of Qihoo 360 Vulcan Team that received a $5,000 reward.

Google issued security patches to address another Critical flaw in Chrome, the flaw was fixed in April with the 66.0.3359.137 version.