Web Browser Vulnerabilities

During the first six months of 2007, 39 vulnerabilities were documented in Microsoft Internet Explorer. Of these, one was considered to be high severity, 15 were medium severity and 23 were low. During the same time period, 34 vulnerabilities were disclosed that affected Mozilla browsers. Of these, 12 were considered to be medium severity and 22 were considered low.

Source: Symantec Internet Security Threat Report, Vol. XII