The API in Cisco Application Policy Infrastructure Controller Enterprise Module (APIC-EM) 1.0(1) allows remote attackers to spoof administrative notifications via crafted attribute-value pairs, aka Bug ID CSCux15521.
http://www.securitytracker.com/id/1035702
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160428-apic