Cyber Security 2005 Summary: http://www.us-cert.gov/cas/bulletins/SB2005.html#Windows
Information in the US-CERT Cyber Security Bulletin is a compilation and includes information published by outside sources, so the information should not be considered the result of US-CERT analysis. Software vulnerabilities are categorized in the appropriate section reflecting the operating system on which the vulnerability was reported; however, this does not mean that the vulnerability only affects the operating system reported since this information is obtained from open-source information.
This bulletin provides a year-end summary of software vulnerabilities that were identified between January 2005 and December 2005. The information is presented only as a index with links to the US-CERT Cyber Security Bulletin the information was published in. There were 5198 reported vulnerabilities: 812 Windows operating system vulnerabilities; 2328 Unix/Linux operating vulnerabilities; and 2058 Multiple operating system vulnerabilities.
Total 2005 *reported* vulnerabilities: 5198
Windows OS: 812
Multiple OS: 2058
And Linux fans are still saying Windows is full of vulnerabilities. ha!. Number of vulnerabilities in Linux is almost 3 times higher than windows. But in the enviorenment it looks like windows has most number of vulnerabilities, because majority uses Windows. Even though Linux is full of vulnerabilities still those are not that popular because only few are using Linux compared to Windows.
Hey Manzi ... thanks for the info.