For those that run Internet Explorer, make sure you get your machines patched up! Internet Explorer 9 has a vulnerability that has been fixed. The patch is available via Windows Update, which for most of us is set to automatically update. For those that aren’t, make sure you do it manually! For those that use Firefox or Opera (or GASP! Safari), you don’t need to worry about it too much. It may be safe to patch it in case a guest visits and uses IE instead of your alternative browser.
The December 2011 Cumulative Security Update for Internet Explorer is now available via Windows Update. This security update resolves three privately reported vulnerabilities in Internet Explorer. The most severe vulnerabilities could allow remote code execution if a user visits a specially crafted Web page using Internet Explorer. An attacker who successfully exploited this vulnerability could run a malicious application on the affected system. Users whose accounts are configured to have fewer user rights on the system could be less affected than users who operate with administrative user rights.