A total of 327,598,028 attempts to infect users computers in different countries around the world were recorded thats 26.8% more than in the previous quarter. The US and Russia were both ahead of China in terms of the number of malicious hosting servers. Six of the ten most common vulnerabilities found were in Microsoft products. Roughly fifty percent of all exploits take advantage of vulnerabilities in Adobe programs due to the fact that Adobe programs are widespread and can be run on a number of different platforms.”]
Source: https://securelist.com/information-security-threats-in-the-first-quarter-of-2010/36303/