Fortinet has announced the top 10 most reported high-risk threats for September 2007. The report, compiled from all FortiGate multi-threat security systems in production worldwide, is a service of the Fortinet Global Security Research Team.

The September top 10 highlights the following:
• CashOn reaches the top of the list this month, moving from last month's fourth place. The adware toolbar plugin has almost doubled in volume since August and is far ahead of the rest of the top 10 in terms of activity.
• Obscured!exploit continues to gain momentum, though not as fast as CashOn. This malware is part of the top ten for the second consecutive month with a 10 percent increase in its level of activity compared to August.

As stated earlier, the most notable threat in September's top 10 is CashOn, an adware toolbar plugin that first made its mark on the list last month. The adware has experienced an activity increase of almost ten-fold within the last two months, achieving a 90% growth rate.