Malicious Code That Exploits Vulnerabilities

During the second half of 2007, 10% of the 1,032 documented malicious code instances exploited vulnerabilities. This is lower than the 18% proportion of the 1,509 malicious code instances documented in the first half of 2007. While the number of new samples exploiting vulnerabilities declined in the current reporting period, this method of propagation remains effective.

Source: Symantec Internet Security Threat Report, Vol. XIII