This article is written in a very misleading manner. It leads you to believe that Cisco have announced that 42 products are affected by the Struts bug.
That is most definitely NOT what the Cisco advisory (currently) says:
At the time of publication, no Cisco products are known to be affected by this vulnerability.
The Cisco article just lists 42 products that are being investigated to see if they are affected by the bug. As their investigations proceed, I expect some products will be affected. But right now, no products are listed as being affected.
Tabloid journalism at its best.