Vulnerabilities have been reported in Mozilla Firefox and Thunderbird. These vulnerabilities could be exploited by malicious people to ypass browser/mail client security restrictions, disclose information, and conduct cross-site scripting and phishing attacks. Version 184.108.40.206 fixes these issues for both Firefox and Thunderbird, so update as soon as possible.
An Excel exploit has been released into the wild. The exploit takes advantage of a vulnerability described in MS08-014. Microsoft has already released an update for this, so if it hasn’t been installed already. Now would be a really great time to do so.