How severe is CVE-2018-6703?

CVE-2018-6703 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-6703 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-6703?

CVE-2018-6703 affects Mcafee Agent. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-6703?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-6703 published?

CVE-2018-6703 was published on 2018-12-11 and last updated on 2026-06-17.

CVE-2018-6703

CVE-2018-6703 is a critical-severity vulnerability in Mcafee Agent with a CVSS 3.x base score of 9.8. 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-416.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-416
Affected product: Mcafee Agent
Published: 2018-12-11
Last modified: 2026-06-17

Description

Use After Free in Remote logging (which is disabled by default) in McAfee McAfee Agent (MA) 5.x prior to 5.6.0 allows remote unauthenticated attackers to cause a Denial of Service and potentially a remote code execution via a specially crafted HTTP header sent to the logging service.

Frequently asked questions

What is CVE-2018-6703?: Use After Free in Remote logging (which is disabled by default) in McAfee McAfee Agent (MA) 5.x prior to 5.6.0 allows remote unauthenticated attackers to cause a Denial of Service and potentially a remote code execution via a specially crafted HTTP header sent to the logging service.
How severe is CVE-2018-6703?: CVE-2018-6703 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-6703 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-6703?: CVE-2018-6703 affects Mcafee Agent. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-6703?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-6703 published?: CVE-2018-6703 was published on 2018-12-11 and last updated on 2026-06-17.

References

https://kc.mcafee.com/corporate/index?page=content&id=SB10258

Affected products (1)

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

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