CVE-2020-3388: Cisco SD-WAN Firmware

High severity, CVSS 7.8. EPSS: 0.4% chance of exploitation in the next 30 days.

A vulnerability in the CLI of Cisco SD-WAN vManage Software could allow an authenticated, local attacker to inject arbitrary commands that are executed with root privileges. The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by authenticating to the device and submitting crafted input to the CLI. The attacker must be authenticated to access the CLI. A successful exploit could allow the attacker to execute commands with root privileges.

Affected products

• Cisco SD-WAN Firmware: up to and including 18.3.0; from 18.4.0, before 19.2.2 (fixed in 19.2.2); from 19.3.0, before 20.1.1 (fixed in 20.1.1)

Published 2020-07-16. Last modified 2026-06-17.