A vulnerability exists in the ClearPass Policy Manager Guest User Interface that can allow an unauthenticated attacker to send specific operations which result in a Denial-of-Service condition. A successful exploitation of this vulnerability results in the unavailability of the guest interface in Aruba ClearPass Policy Manager version(s): 6.10.x: 6.10.6 and below; 6.9.x: 6.9.11 and below. Aruba has released upgrades for Aruba ClearPass Policy Manager that address this security vulnerability.