/usr/lib/x86_64-linux-gnu/libcec.so.4 is in libcec4 4.0.2+dfsg1-2ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libcec.so.4.0.2
/usr/lib/x86_64-linux-gnu/libcec.so.4.0.2