Unspecified vulnerability in Xerox WorkCentre and WorkCentre Pro before 12.060.17.000, 13.x before 13.060.17.000, and 14.x before 14.060.17.000 allows attackers to modify signatures of e-mail messages via unspecified vectors.
http://www.xerox.com/downloads/usa/en/c/cert_XRX06_006_v1b.pdf