CVE-2019-3654

Name: CVE-2019-3654
Creator: NVD / NIST
Published: 2019-11-22T20:15:11.513+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 0.66%

Last modified Jun 17, 2026

CVE-2019-3654 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. Authentication Bypass vulnerability in the Microsoft Windows client in McAfee Client Proxy (MCP) prior to 3.0.0 allows local user to bypass scanning of web traffic and gain access to blocked sites for a short period of time via generating an authorization key on the client which should only be generated by the network administrator.. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

Description

Authentication Bypass vulnerability in the Microsoft Windows client in McAfee Client Proxy (MCP) prior to 3.0.0 allows local user to bypass scanning of web traffic and gain access to blocked sites for a short period of time via generating an authorization key on the client which should only be generated by the network administrator.

Metrics

CVSS 3.1

8.6/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS Probability

0.66%

47.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-287

Affected Software

Vendor	Product	Versions
Mcafee	Client Proxy	< 3.0.0

References

Timeline

Published: Nov 22, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-3654?

How severe is CVE-2019-3654?

CVE-2019-3654 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.

How do I fix CVE-2019-3654?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-3654?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST