CVE-2021-23885: Privilege escalation vulnerability in McAfee Web Gateway (MWG) UI

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-02-17 · updated 2026-06-17
Weakness: CWE-269

Description

Privilege escalation vulnerability in McAfee Web Gateway (MWG) prior to 9.2.8 allows an authenticated user to gain elevated privileges through the User Interface and execute commands on the appliance via incorrect improper neutralization of user input in the troubleshooting page.

Affected products

McAfee Web Gateway (MWG): before 8.2.17; from 9.2 before 9.2.8; from 10.0 before 10.0.4 — fixed in 10.0.4, 8.2.17, 9.2.8

How to fix

Upgrade to a fixed version: McAfee Web Gateway (MWG) 10.0.4, 8.2.17, 9.2.8. Check the vendor advisory for mitigations.

References

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