Zero-day vulnerabilities are the top security concern for the majority (54 percent) of IT professionals, according to the results of an annual customer survey conducted by PatchLink Corporation, a global leader in security and vulnerability management. Seventy (70 percent) of IT managers completed fire-drill remediations within eight hours in 2007 compared to just 39 percent during the previous year. In addition, many respondents (60 percent) supplemented their vulnerability management process to include both agent- and network-based vulnerability scanning. As a result, a vast majority (99 percent) of respondents say their organizations are as secure or more secure today than they were in 2006.