How severe is CVE-2021-23883?

CVE-2021-23883 has a CVSS 3.x base score of 4.0, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-23883 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-23883?

CVE-2021-23883 affects Mcafee Endpoint Security. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-23883?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-23883 published?

CVE-2021-23883 was published on 2021-02-10 and last updated on 2026-06-17.

CVE-2021-23883

CVE-2021-23883 is a medium-severity vulnerability in Mcafee Endpoint Security with a CVSS 3.x base score of 4.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: Medium (CVSS 3.x base score 4.0)
CVSS v2: 4.9
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Mcafee Endpoint Security
Published: 2021-02-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-23883?: 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.
How severe is CVE-2021-23883?: CVE-2021-23883 has a CVSS 3.x base score of 4.0, rated medium severity. It is exploitable over local access with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-23883 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-23883?: CVE-2021-23883 affects Mcafee Endpoint Security. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-23883?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-23883 published?: CVE-2021-23883 was published on 2021-02-10 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:mcafee:endpoint_security:*:*:*:*:*:windows:*:*

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