What’s Vulnerable › Vulnerabilities

CVE-2021-22037

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-10-29 · updated 2026-06-17
• Weakness: CWE-427

Description

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
• VMware InstallBuilder: All InstallBuilder versions prior to version 21.6.0

How to fix

Upgrade to a fixed version: VMware InstallBuilder 21.6.0. Check the vendor advisory for mitigations.

References

• https://blog.installbuilder.com/2021/10/installbuilder-2160-released.html
• https://blog.installbuilder.com/2021/10/installbuilder-2160-released.html

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