http://www.computerworld.com/action...ArticleBasic&articleId=9077099&intsrc=hm_list
ActiveX accounted for 79% of the 239 plug-in bugs discovered between July and December of 2007, Symantec said. The plug-in with the next-highest number of flaws was Apple Inc.'s QuickTime, which had just 8% of the six-month's total.
...
IE7 hasn't had a measurable impact on the number of ActiveX vulnerabilities, In the second half of 2007, Symantec detected 190 ActiveX vulnerabilities, down about 10% from the 210 found in the first six months of that year.
...
Other plug-ins for which Symantec tallied vulnerabilities included Sun's Java (13 flaws detected), Adobe's Flash (11), Microsoft's Windows Media Player (4) and Adobe's Acrobat Reader (1).