CVE-2020-3227: Cisco IOS XE

Critical severity, CVSS 9.8. EPSS: 3.4% chance of exploitation in the next 30 days.

A vulnerability in the authorization controls for the Cisco IOx application hosting infrastructure in Cisco IOS XE Software could allow an unauthenticated, remote attacker to execute Cisco IOx API commands without proper authorization. The vulnerability is due to incorrect handling of requests for authorization tokens. An attacker could exploit this vulnerability by using a crafted API call to request such a token. An exploit could allow the attacker to obtain an authorization token and execute any of the IOx API commands on an affected device.

Affected products

• Cisco IOS XE: version 3.11.6e only; version 16.3.1 only; version 16.3.1a only; version 16.3.2 only; version 16.3.3 only; version 16.3.4 only; …

Published 2020-06-03. Last modified 2026-06-17.