High
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.
Privilege Escalation
Cisco
Cisco IOS XE Software releases 16.3.1 and later
Refer to vendor’s advisory for the list of affected products and upgraded patches.
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxPE-KgGvCAf9