CVE-2021-23883: Null Pointer Dereference vulnerability in McAfee Endpoint Security (ENS)

Severity: medium (CVSS 4.4 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: 2021-02-10 · updated 2026-06-17
Weakness: CWE-476

Description

A Null Pointer Dereference vulnerability in McAfee Endpoint Security (ENS) for Windows prior to 10.7.0 February 2021 Update allows a local administrator to cause Windows to crash via a specific system call which is not handled correctly. This varies by machine and had partial protection prior to this update.

Affected products

McAfee LLC McAfee Endpoint Security (ENS): before 10.7.0 — fixed in 10.7.0

How to fix

Upgrade to a fixed version: McAfee LLC McAfee Endpoint Security (ENS) 10.7.0. Check the vendor advisory for mitigations.

References

https://kc.mcafee.com/corporate/index?page=content&id=SB10345
https://kc.mcafee.com/corporate/index?page=content&id=SB10345

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