CVE-2019-17093: Avast Antivirus

High severity, CVSS 7.8. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

  • Avast Antivirus: before 19.8 (fixed in 19.8)
  • Avg Anti-Virus: before 19.8 (fixed in 19.8)

Published 2019-10-23. Last modified 2026-06-17.