CVE-2019-18894

In Avast Premium Security 19.8.2393, attackers can send a specially crafted request to the local web server run by Avast Antivirus on port 27275 to support Bank Mode functionality. A flaw in the processing of a command allows execution of arbitrary OS commands with the privileges of the currently logged in user. This allows for example attackers who compromised a browser extension to escape from the browser sandbox.

• CWE-78

• https://palant.de/2020/01/13/pwning-avast-secure-browser-for-fun-and-profit/Exploit, Third Party Advisory
• https://palant.de/2020/01/13/pwning-avast-secure-browser-for-fun-and-profit/Exploit, Third Party Advisory

Published

Jan 13, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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