CVE-2021-22037: VMware Installbuilder

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

Under certain circumstances, when manipulating the Windows registry, InstallBuilder uses the reg.exe system command. The full path to the command is not enforced, which results in a search in the search path until a binary can be identified. This makes the installer/uninstaller vulnerable to Path Interception by Search Order Hijacking, potentially allowing an attacker to plant a malicious reg.exe command so it takes precedence over the system command. The vulnerability only affects Windows installers.

Affected products

• VMware Installbuilder: before 21.6.0 (fixed in 21.6.0)

Published 2021-10-29. Last modified 2026-06-17.