CVE-2021-31847

HIGH

McAfee Agent < 5.7.4 - DLL Preloading Privilege Escalation via Unprotected Repair Directory

Title source: llm
STIX 2.1

Description

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.

References (2)

Core 2
Core References
Third Party Advisory, VDB Entry x_refsource_misc
https://www.zerodayinitiative.com/advisories/ZDI-21-1104/

Scores

CVSS v3 8.2
EPSS 0.0003
EPSS Percentile 10.1%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Details

CWE
CWE-269 CWE-427 CWE-347
Status published
Products (1)
mcafee/agent < 5.7.4
Published Sep 22, 2021
Tracked Since Feb 18, 2026