iDefense has released five vulnerabilities against the Linksys WRT54G wireless access point/switch/router.  Some of these vulnerabilities are very serious.  Users of these products are highly recommended to patch their devices.  Patches for the latest versions are available at  http://www.linksys.com .

The iDefense advisories are here:
iDefense advisory 304
iDefense advisory 305
iDefense advisory 306
iDefense advisory 307
iDefense advisory 308