CVE-2019-17093

HIGH

Avast Antivirus < 19.8 - Uncontrolled Search Path

Title source: rule

Description

An issue was discovered in Avast antivirus before 19.8 and AVG antivirus before 19.8. A DLL Preloading vulnerability allows an attacker to implant %WINDIR%\system32\wbemcomn.dll, which is loaded into a protected-light process (PPL) and might bypass some of the self-defense mechanisms. This affects all components that use WMI, e.g., AVGSvc.exe 19.6.4546.0 and TuneupSmartScan.dll 19.1.884.0.

References (2)

[Exploit, Technical Description, Third Party Advisory] https://safebreach.com/Post/Avast-Antivirus-AVG-Antivirus-DLL-Preloading-into-PPL-and-Potential-Abuses

[Third Party Advisory] https://safebreach.com/blog

Scores

CVSS v3 7.8

EPSS 0.0005

EPSS Percentile 13.9%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Classification

CWE

CWE-427

Status published

Affected Products (2)

avast/antivirus < 19.8

avg/anti-virus < 19.8

Timeline

Published Oct 23, 2019

Tracked Since Feb 18, 2026