Computerworld reports that Microsoft released a <A HREF="http://www.computerworld.com/securitytopics/security/story/0,10801,75067,00.html">security alert</A> acknowledging a serious security hole in Outlook Express. The vulnerability, which was found in Outlook Express versions 5.5 and 6.0, could allow a remote attacker to take control of machines running Outlook Express using malicious code embedded in an email message.