How severe is CVE-2021-31839?

CVE-2021-31839 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2021-31839 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-31839?

CVE-2021-31839 affects Mcafee Agent. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-31839?

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

When was CVE-2021-31839 published?

CVE-2021-31839 was published on 2021-06-10 and last updated on 2026-06-17.

CVE-2021-31839

CVE-2021-31839 is a medium-severity vulnerability in Mcafee Agent with a CVSS 3.x base score of 4.8. 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-269.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v2: 2.1
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-269
Affected product: Mcafee Agent
Published: 2021-06-10
Last modified: 2026-06-17

Description

Improper privilege management vulnerability in McAfee Agent for Windows prior to 5.7.3 allows a local user to modify event information in the MA event folder. This allows a local user to either add false events or remove events from the event logs prior to them being sent to the ePO server.

Frequently asked questions

What is CVE-2021-31839?: Improper privilege management vulnerability in McAfee Agent for Windows prior to 5.7.3 allows a local user to modify event information in the MA event folder. This allows a local user to either add false events or remove events from the event logs prior to them being sent to the ePO server.
How severe is CVE-2021-31839?: CVE-2021-31839 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2021-31839 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-31839?: CVE-2021-31839 affects Mcafee Agent. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-31839?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-31839 published?: CVE-2021-31839 was published on 2021-06-10 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:mcafee:agent:*:*:*:*:*:windows:*:*

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