What’s Vulnerable › Vulnerabilities

CVE-2021-31840: DLL preload vulnerability in McAfee Agent for Windows

• Severity: high (CVSS 7.3 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: 2021-06-10 · updated 2026-06-17
• Weakness: CWE-427

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 products

• Intel McAfee Agent: from 5.0.0 before 5.7.3 — fixed in 5.7.3

How to fix

Upgrade to a fixed version: Intel McAfee Agent 5.7.3. Check the vendor advisory for mitigations.

References

• https://kc.mcafee.com/corporate/index?page=content&id=SB10362
• https://kc.mcafee.com/corporate/index?page=content&id=SB10362

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