CVE-2016-20059: IObit Malware Fighter 4.3.1 Unquoted Service Path Privilege Escalation

Security readout for executives and security teams

This is a local privilege-escalation issue in IObit Malware Fighter 4.3.1. A user who already has access to a Windows machine could abuse misconfigured service paths to run code as LocalSystem after a service restart or reboot. It is not a remote, internet-facing vulnerability, but it can turn a small foothold into full host control. Exposure is limited to Windows systems running IObit Malware Fighter 4.3.1 with the affected services installed. Organizations that do not deploy this product or version are unlikely to be affected. Because the issue is local-only, risk is highest on shared workstations, unmanaged endpoints, and systems where attackers may already have user-level access. Treat as high priority where IObit Malware Fighter 4.3.1 is installed, especially on business-critical or shared Windows endpoints. It is not a perimeter emergency, but it meaningfully increases attacker leverage after an initial compromise. Prioritize inventory first, then remove or update affected deployments based on vendor guidance. Mitigation focus: Inventory endpoints for IObit Malware Fighter 4.3.1.; Check IObit guidance for supported updates or remediation.; Upgrade, replace, or remove affected installations per vendor guidance..

Prepared

Apr 30, 2026, 01:05 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.