CVE-2018-18519: Bestxsoftware Best Free Keylogger

High severity, CVSS 7.8. EPSS: 0.8% chance of exploitation in the next 30 days.

BestXsoftware Best Free Keylogger before 6.0.0 allows local users to gain privileges via a Trojan horse "%PROGRAMFILES%\BFK 5.2.9\syscrb.exe" file because of insecure permissions for the BUILTIN\Users group.

Affected products

• Bestxsoftware Best Free Keylogger: up to and including 5.2.9

Published 2018-11-19. Last modified 2026-06-17.