CVE-2020-3504: Cisco Firepower Extensible Operating System

Low severity, CVSS 3.3. EPSS: 0.3% chance of exploitation in the next 30 days.

A vulnerability in the local management (local-mgmt) CLI of Cisco UCS Manager Software could allow an authenticated, local attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper handling of CLI command parameters. An attacker could exploit this vulnerability by executing specific commands on the local-mgmt CLI on an affected device. A successful exploit could allow the attacker to cause internal system processes to fail to terminate properly, which could result in a buildup of stuck processes and lead to slowness in accessing the UCS Manager CLI and web UI. A sustained attack may result in a restart of internal UCS Manager processes and a temporary loss of access to the UCS Manager CLI and web UI.

Affected products

• Cisco Firepower Extensible Operating System: affected versions not specified
• Cisco NX-OS: affected versions not specified; from 4.0, before 4.0\(4i\) (fixed in 4.0\(4i\))

Published 2020-08-27. Last modified 2026-06-17.