ICS-CERT has released an advisory on a PHOENIX CONTACT, Innominate Security Technologies mGuard firmware vulnerability. Versions 8.0.0 to 8.5.1 of the firmware running on a variety of mGuard Network Security Appliances are affected. Successful exploitation of this vulnerability could allow attackers to cause a remote denial of service and force a restart of all IPSec connections. PHOENIX CONTACT and Innominate Security Technologies recommend users update to firmware Version 8.5.2 or higher, which fixes this vulnerability. ICS-CERT.