How severe is CVE-2019-3638?

CVE-2019-3638 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2019-3638 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-3638?

CVE-2019-3638 affects Mcafee Web Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-3638?

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

When was CVE-2019-3638 published?

CVE-2019-3638 was published on 2019-09-12 and last updated on 2026-06-17.

CVE-2019-3638

CVE-2019-3638 is a high-severity vulnerability in Mcafee Web Gateway with a CVSS 3.x base score of 8.1. 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-79.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 4.3
EPSS exploit prediction: 2% (77th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Mcafee Web Gateway
Published: 2019-09-12
Last modified: 2026-06-17

Description

Reflected Cross Site Scripting vulnerability in Administrators web console in McAfee Web Gateway (MWG) 7.8.x prior to 7.8.2.13 allows remote attackers to collect sensitive information or execute commands with the MWG administrator's credentials via tricking the administrator to click on a carefully constructed malicious link.

Frequently asked questions

What is CVE-2019-3638?: Reflected Cross Site Scripting vulnerability in Administrators web console in McAfee Web Gateway (MWG) 7.8.x prior to 7.8.2.13 allows remote attackers to collect sensitive information or execute commands with the MWG administrator's credentials via tricking the administrator to click on a carefully constructed malicious link.
How severe is CVE-2019-3638?: CVE-2019-3638 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2019-3638 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (77th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-3638?: CVE-2019-3638 affects Mcafee Web Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-3638?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-3638 published?: CVE-2019-3638 was published on 2019-09-12 and last updated on 2026-06-17.

References

https://kc.mcafee.com/corporate/index?page=content&id=SB10294

Affected products (1)

cpe:2.3:a:mcafee:web_gateway:*:*:*:*:*:*:*:*

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