If your concerned about security and need to know the latest information about possible virus and malware threats, then take a quick look at the following list. The data from these sites is updated regularly and can help you keep ahead of an outbreak or attack.
McAfee Virus Information
Symantec/Norton’s Threat Explorer
Get a breakdown of vulnerabilities, threats, and risks at Symantec’s Threat Explorer. Plus see what popular “applications” are currently vulnerable to attacks so you can get them patched.
Trend Micro’s Threat Encyclopedia
See the latest that Trend Micro has identified as a threat at the Threat Encyclopedia.
Microsoft Security Bulletins
The Security Focus Vulnerabilities page allows you to search for vulnerabilities by vendor. Get even more granular by drilling down into titles and software versions. Get your Security Focus newsletters too.
Computer Associates – Vulnerability Information Center
Find newly discovered vulnerabilities and alerts from the Vulnerability Information Center at CA. From there branch off to virus and spyware news.
I’m sure there are a few more reputable sources for this kind of information. Please post your favorites in the comments.