How severe is CVE-2019-3635?

CVE-2019-3635 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2019-3635 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-3635?

CVE-2019-3635 affects Mcafee Web Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-3635?

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

When was CVE-2019-3635 published?

CVE-2019-3635 was published on 2019-08-14 and last updated on 2026-06-17.

CVE-2019-3635

CVE-2019-3635 is a medium-severity vulnerability in Mcafee Web Gateway with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Mcafee Web Gateway
Published: 2019-08-14
Last modified: 2026-06-17

Description

Exfiltration of Data in McAfee Web Gateway (MWG) 7.8.2.x prior to 7.8.2.12 allows attackers to obtain sensitive data via crafting a complex webpage that will trigger the Web Gateway to block the user accessing an iframe.

Frequently asked questions

What is CVE-2019-3635?: Exfiltration of Data in McAfee Web Gateway (MWG) 7.8.2.x prior to 7.8.2.12 allows attackers to obtain sensitive data via crafting a complex webpage that will trigger the Web Gateway to block the user accessing an iframe.
How severe is CVE-2019-3635?: CVE-2019-3635 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2019-3635 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-3635?: CVE-2019-3635 affects Mcafee Web Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-3635?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-3635 published?: CVE-2019-3635 was published on 2019-08-14 and last updated on 2026-06-17.

References

https://kc.mcafee.com/corporate/index?page=content&id=SB10293

Affected products (1)

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

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