The XML parser in the management interface in Cisco Adaptive Security Appliance (ASA) Software 8.4 allows remote authenticated users to cause a denial of service (device crash) via a crafted XML document, aka Bug ID CSCut14223.
http://www.securitytracker.com/id/1034251
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151123-asa