CVE-2021-31840

DLL preload vulnerability in McAfee Agent for Windows

HIGH
7.3
CVSS Score
Published: June 10, 2021 at 04:20 PM UTC
Updated: June 17, 2026 at 03:52 AM UTC
1 product affected across 1 vendorMcAfee Agent

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Severity
HIGH7.3
Exploit prediction
EPSS 0.3%

Description

A vulnerability in the preloading mechanism of specific dynamic link libraries in McAfee Agent for Windows prior to 5.7.3 could allow an authenticated, local attacker to perform a DLL preloading attack with unsigned DLLs. To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system. This would result in the user gaining elevated permissions and being able to execute arbitrary code.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.7.35.0.0 ≤ v < 5.7.3
Affected range stops below 5.7.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

CVSS

7.3HIGHtrellix
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-427

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