http://www.us-cert.gov/cas/techalerts/TA06-081A.html
All Webair managed clients have been patched up already...If you are a webair.com client and have any questions please feel free to shoot me an email at your convenience.
----------------------------------------------------
Sendmail Race Condition Vulnerability
Original release date: March 22, 2006
Last revised: --
Source: US-CERT
Systems Affected
Sendmail versions prior to 8.13.6.
Overview
A race condition in Sendmail may allow a remote attacker to execute arbitrary code.
http://www.us-cert.gov/cas/techalerts/TA06-081A.html