CVE-2021-34725: Cisco IOS XE SD-WAN

Medium severity, CVSS 6.7. EPSS: 0.4% chance of exploitation in the next 30 days.

A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to inject arbitrary commands to be executed with root-level privileges on the underlying operating system. This vulnerability is due to insufficient input validation on certain CLI commands. An attacker could exploit this vulnerability by authenticating to an affected device and submitting crafted input to the CLI. The attacker must be authenticated as an administrative user to execute the affected commands. A successful exploit could allow the attacker to execute commands with root-level privileges.

Affected products

• Cisco IOS XE SD-WAN: up to and including 17.2.1r

Published 2021-09-23. Last modified 2026-06-17.