Critical, on 1800: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-ap1800?vs_f=Cisco%20Security%20Advisory&vs_cat=Security%20Intelligence&vs_type=RSS&vs_p=Cisco%20Mobility%20Express%201800%20Access%20Point%20Series%20Authentication%20Bypass%20Vulnerability&vs_k=1
High on a range of APs: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170503-cme?vs_f=Cisco%20Security%20Advisory&vs_cat=Security%20Intelligence&vs_type=RSS&vs_p=Cisco%20Aironet%201800,%202800,%20and%203800%20Series%20Access%20Points%20Plug-and-Play%20Arbitrary%20Code%20Execution%20Vulnerability&vs_k=1
:tmyk:
EDIT: The good news is that there are software upgrades available to fix these issues.