CVE-2020-3974

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-10 · updated 2026-06-17

Description

VMware Fusion (11.x before 11.5.5), VMware Remote Console for Mac (11.x and prior before 11.2.0 ) and Horizon Client for Mac (5.x and prior before 5.4.3) contain a privilege escalation vulnerability due to improper XPC Client validation. Successful exploitation of this issue may allow attackers with normal user privileges to escalate their privileges to root on the system where Fusion, VMware Remote Console for Mac or Horizon Client for Mac is installed.

Affected products

VMware Fusion: from 11.0.0 before 11.5.5 — fixed in 11.5.5
VMware Horizon Server: from 5.0.0 before 5.4.3 — fixed in 5.4.3
VMware Remote Console: from 11.0.0 before 11.2.0 — fixed in 11.2.0
VMware Fusion, VMware Remote Console for Mac and Horizon Client for Mac: VMware Fusion (11.x before 11.5.5), VMware Remote Console for Mac (11.x and prior before 11.2.0 ) and Horizon Client for Mac (5.x and prior before 5.4.3)

How to fix

Upgrade to a fixed version: VMware Fusion 11.5.5; VMware Horizon Server 5.4.3; VMware Remote Console 11.2.0. Check the vendor advisory for mitigations.

References

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