CVE-2019-17093

HighCVSS 7.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-427

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://safebreach.com/Post/Avast-Antivirus-AVG-Antivirus-DLL-Preloading-into-PPL-and-Potential-AbusesExploit, Technical Description, Third Party Advisory
https://safebreach.com/blogThird Party Advisory
https://safebreach.com/Post/Avast-Antivirus-AVG-Antivirus-DLL-Preloading-into-PPL-and-Potential-AbusesExploit, Technical Description, Third Party Advisory
https://safebreach.com/blogThird Party Advisory

Timeline

Published: Oct 23, 2019
Last modified: Jun 17, 2026
NVD status: Modified

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