Tenable Network Security discovered a security flaw in software commonly used to backup important corporate data. After notifying Symantec of the problem, their engineers conducted a review of all effected products and have released a set of hotfixes. Tenable has also released a Nessus plugin which detects the missing patch.
This particular vulnerability effects enterprise networks which use the "Backup Exec" software to ensure their data is stored in a safe and central location. This also makes it convenient for an insider to attack one spot and obtain the data they are after.