A vulnerability in Cisco IOS XE Software could allow an authenticated, local attacker to escalate their privileges to a user with root-level privileges. The vulnerability is due to insufficient validation of user-supplied content. This vulnerability could allow an attacker to load malicious software onto an affected device.
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-priv-esc2-A6jVRu7C