/usr/lib/libNeXusCPP.so.0 is in libnexus0 4.3.2-svn1921-2+b2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libNeXusCPP.so.0.5.0
/usr/lib/libNeXusCPP.so.0.5.0