CVE-2021-23890: McAfee ePO Information Leak vulnerability

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-26 · updated 2026-06-17
Weakness: CWE-200

Description

Information leak vulnerability in the Agent Handler of McAfee ePolicy Orchestrator (ePO) prior to 5.10 Update 10 allows an unauthenticated user to download McAfee product packages (specifically McAfee Agent) available in ePO repository and install them on their own machines to have it managed and then in turn get policy details from the ePO server. This can only happen when the ePO Agent Handler is installed in a Demilitarized Zone (DMZ) to service machines not connected to the network through a VPN.

Affected products

McAfee,LLC McAfee ePolicy Orchestrator (ePO): before 5.9.1; 5.10.0, 5.10.0-update_1, 5.10.0-update_2, 5.10.0-update_3, 5.10.0-update_4, 5.10.0-update_5 (+4) — fixed in 5.9.1

How to fix

Upgrade to a fixed version: McAfee,LLC McAfee ePolicy Orchestrator (ePO) 5.9.1. Check the vendor advisory for mitigations.

References

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