Or "Joomla", or whatever.
There are a lot of already existing and popular CMS like Wordpress, Joomla, Drupal, etc...
But they're complicated beasts (I do happen to write extensions - or plugins - for Wordpress and Joomla), so it's far more convenient and agile, for a developer like me, to use a custom and far more open, performant and powerful CMS, built by hand.
Microsoft Access is a Windows Desktop application, which means an unparallelled user interface compared to the web based ones. The Access application (developed on V1 in two days), allows for a very fast and comfortable modify-publish content lifecycle.
An image being better than words, here's a (old) peek to the user interface:
The statistical CERT bulletins analysis tool is also developed with Office desktop apps like Access and Excel. The tool is a quite huge automation system mainly written in Access VBA.