Unspecified vulnerability in ESS/ Network Controller and MicroServer Web Server in Xerox WorkCentre Pro and Xerox WorkCentre running software 13.027.24.015 and 14.027.24.015 allows remote attackers to "reduce effectiveness of security features" via unknown attack vectors.
http://www.xerox.com/downloads/usa/en/c/cert_XRX06_001.pdf
http://www.vupen.com/english/advisories/2006/0668