CVE-2015-5737: Fortinet FortiClient

High severity, CVSS 7.2. EPSS: 0.5% chance of exploitation in the next 30 days.

The (1) mdare64_48.sys, (2) mdare32_48.sys, (3) mdare32_52.sys, (4) mdare64_52.sys, and (5) Fortishield.sys drivers in Fortinet FortiClient before 5.2.4 do not properly restrict access to the API for management of processes and the Windows registry, which allows local users to obtain a privileged handle to a PID and possibly have unspecified other impact, as demonstrated by a 0x2220c8 ioctl call.

Affected products

• Fortinet FortiClient: up to and including 5.2.3

Published 2015-09-03. Last modified 2026-06-17.