McAfee Endpoint Security firewall not always acting on GTI lookup results

published 2019-05-15 7y ago modified 2026-06-17 4mo ago also EUVD-2019-13221

cvss: 7.5; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits: 0; none known

Protection Mechanism Failure in the Firewall in McAfee Endpoint Security (ENS) 10.x prior to 10.6.1 May 2019 update allows context-dependent attackers to circumvent ENS protection where GTI flagged IP addresses are not blocked by the ENS Firewall via specially crafted malicious sites where the GTI reputation is carefully manipulated and does not correctly trigger the ENS Firewall to block the connection.

Patch / fix

fixed in 1

McAfee, LLC McAfee Endpoint Security (ENS) 10.6.1 May 2019 update

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Exploit prediction

0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
CNA	3.0	7.5	CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:H
NVD	2.0	5.1	AV:N/AC:H/Au:N/C:P/I:P/A:P

Affected products

McAfee, LLC McAfee Endpoint Security (ENS)

Classification

Weakness

CWE-693 Protection Mechanism Failure

References

Sources

CVE List CVE-2019-3586
NVD CVE-2019-3586

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