What is CVE-2019-3643?

CVE-2019-3643 is a medium-severity vulnerability in Mcafee Active Response. CVSS score: 5.3/10. Published 2019-09-11.

How severe is CVE-2019-3643?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Mcafee Active Response

CVE-2019-3643

McAfee Web Gateway (MWG) earlier than 7.8.2.13 is vulnerable to a remote attacker exploiting CVE-2019-9511, potentially leading to a denial of service. This affects the scanning proxies.

Published 2019-09-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.024 (83.3th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000

Affected products

Mcafee Active Response — versions 1.0.0, 1.1.0, 2.0
Mcafee Advanced Threat Defense — versions 4.0, 4.2, 4.4
Mcafee Enterprise Security Manager — versions 10.2.0, 10.3.4, 10.4.0
Mcafee Web Gateway
Mcafee, Llc Mcafee Web Gateway (Mwg) — versions 7.8.2.13

References

kc.mcafee.com/corporate/index

Frequently asked questions

What is CVE-2019-3643?: CVE-2019-3643 is a medium-severity vulnerability in Mcafee Active Response. CVSS score: 5.3/10. Published 2019-09-11.
How severe is CVE-2019-3643?: Medium severity. CVSS v3 base score is 5.3 out of 10.