Cisco has released security updates to address vulnerabilities affecting multiple products

Cisco has released security updates to address vulnerabilities affecting
multiple products. An attacker could exploit one of these vulnerabilities to
take control of an affected system.

NCCIC/US-CERT encourages users and administrators to review the following
Cisco Security Advisories and apply the necessary updates:

• Email Security and Content Security Management
  Appliance Privilege Escalation Vulnerability cisco-sa-20180117-esasma
  
• NX-OS Software Pong Packet Denial of Service
  Vulnerability cisco-sa-20180117-nx-os
  
• Unified Customer Voice Portal Denial of Service
  Vulnerability cisco-sa-20180117-cv