CVE-2020-3957: VMware Fusion

High severity, CVSS 7.0. EPSS: 0.2% chance of exploitation in the next 30 days.

VMware Fusion (11.x before 11.5.5), VMware Remote Console for Mac (11.x and prior) and VMware Horizon Client for Mac (5.x and prior) contain a local privilege escalation vulnerability due to a Time-of-check Time-of-use (TOCTOU) issue in the service opener. Successful exploitation of this issue may allow attackers with normal user privileges to escalate their privileges to root on the system where Fusion, VMRC and Horizon Client are installed.

Affected products

• VMware Fusion: from 11.0.0, before 11.5.5 (fixed in 11.5.5)
• VMware Horizon Client: up to and including 5.4.0
• VMware Remote Console: up to and including 11.0.1

Published 2020-05-29. Last modified 2026-06-17.