CVE-2018-10381: McAfee Tunnelbear

Critical severity, CVSS 9.8. EPSS: 3.8% chance of exploitation in the next 30 days.

TunnelBear 3.2.0.6 for Windows suffers from a SYSTEM privilege escalation vulnerability through the "TunnelBearMaintenance" service. This service establishes a NetNamedPipe endpoint that allows arbitrary installed applications to connect and call publicly exposed methods. The "OpenVPNConnect" method accepts a server list argument that provides attacker control of the OpenVPN command line. An attacker can specify a dynamic library plugin that should run for every new VPN connection attempt. This plugin will execute code in the context of the SYSTEM user.

Affected products

• McAfee Tunnelbear: version 3.2.0.6 only

Published 2018-04-26. Last modified 2026-06-17.