Hello, Today, we have accidentally discovered that the vulnerability, which is described here http://www.symantec.com/avcenter/security/Content/2006.09.20a.html and its third party identifications are BID: 20051 Secunia Advisory: SA21938 CVE: CVE-2006-4855 is active again in the today's update of Norton Personal Firewall 2006 version 9.1.1.7. Probably, some changes have been made in the SymEvent driver since it was fixed that causes that the driver is vulnerable again. The version of symevent.sys on the testing system is 12.0.0.20. Kind Regards, -- Matousec - Transparent security Research http://www.matousec.com/