Cisco Nexus, Cisco Unified Computing Systemn (UCS), Cisco MDS 9000 Series Multilayer Switches, and Cisco 1000 Series Connected Grid Routers (CGR) are all based on the Cisco NX-OS operating system. These products are affected by one or more of the following vulnerabilities:
Multiple Cisco Discovery Protocol Vulnerabilities in Cisco NX-OS-Based Products Cisco NX-OS Software SNMP and License Manager Buffer Overflow Vulnerability Cisco NX-OS Software SNMP Buffer Overflow Vulnerability Cisco NX-OS Software Jumbo Packet Denial of Service Vulnerability
Cisco has released free software updates that address these vulnerabilities. 
This advisory is available at the following link: <a href="http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130424-nxosmulti" target="_blank" title="Cisco Security Advisory">http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20130424-nxosmulti</a>

Cisco Security Advisory - Multiple Vulnerabilities in Cisco NX-OS-Based Products