CVE-2021-31847: McAfee Agent

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Improper access control vulnerability in the repair process for McAfee Agent for Windows prior to 5.7.4 could allow a local attacker to perform a DLL preloading attack using unsigned DLLs. This would result in elevation of privileges and the ability to execute arbitrary code as the system user, through not correctly protecting a temporary directory used in the repair process and not checking the DLL signature.

Affected products

• McAfee Agent: before 5.7.4 (fixed in 5.7.4)

Published 2021-09-22. Last modified 2026-06-17.