The web-based management interface on Cisco Small Business 220 devices with firmware before 1.0.1.1 allows remote attackers to cause a denial of service (interface outage) via a crafted HTTP request, aka Bug ID CSCuz76238.
http://www.synacktiv.com/ressources/advisories_cisco_switch_sg220_dos.pdf
http://www.securitytracker.com/id/1036724
http://www.securityfocus.com/bid/92707
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160831-sps2