NewsSecurity Vulnerabilities

Cisco IOS XE SD-WAN Software Command Injection Vulnerability [CVE-2021-1529]

CVE number – CVE-2021-1529

A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to execute arbitrary commands with root privileges.

The vulnerability is due to insufficient input validation by the system CLI. An attacker could exploit this vulnerability by authenticating to an affected device and submitting crafted input to the system CLI. A successful exploit could allow the attacker to execute commands on the underlying operating system with root privileges.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Vulnerable Products

This vulnerability affects the following Cisco products if they are running a vulnerable release of universal Cisco IOS XE Software in Controller mode or a vulnerable release of standalone Cisco IOS XE SD-WAN Software:

  • 1000 Series Integrated Services Routers (ISRs)
  • 4000 Series ISRs
  • ASR 1000 Series Aggregation Services Routers
  • Catalyst 8000 Series Edge Platforms
  • Cloud Services Router (CSR) 1000V Series

This advisory is available at the following link:

Luke Simmonds

Blogger at

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.