CVE-2013-6886
RealVNC VNC 5.0.6 on Mac OS X, Linux, and UNIX allows local users to gain privileges via a crafted argument to the (1) vncserver, (2) vncserver-x11, or (3) Xvnc helper.
Date published : 2013-12-27
http://www.realvnc.com/products/vnc/documentation/5.0/release-notes/