CVE-2019-17093

Name: CVE-2019-17093
Creator: NVD / NIST
Published: 2019-10-23T17:15:12.85+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.57%

Last modified Jun 17, 2026

CVE-2019-17093 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

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

7.8/10

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

EPSS Probability

0.57%

42.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-427

Affected Software

Vendor	Product	Versions
Avast	Antivirus	< 19.8
Avg	Anti-Virus	< 19.8

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
Status: Modified

Frequently Asked Questions

What is CVE-2019-17093?

How severe is CVE-2019-17093?

CVE-2019-17093 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.

How do I fix CVE-2019-17093?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-17093?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST