Cisco IP Phone 8800 devices with software 11.0(1) allow remote attackers to cause a denial of service (memory corruption) via a crafted HTTP request, aka Bug ID CSCuz03038.
http://www.securitytracker.com/id/1036646
http://www.securityfocus.com/bid/92515
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160817-ipp