isco has released security updates for its products.
National CERT encourages users to apply available updates in order to prevent any kind of misuse by the attacker. 

Multiple vulnerabilities in the Cisco Expressway Series could allow an unauthenticated, remote attacker to conduct cross-site request forgery (CSRF) attacks, which could allow the attacker to perform arbitrary actions on an affected device.

For more details please visit: Cisco Security Advisory.