In special relativity, while it is impossible in an inertial frame to accelerate an object to the speed of light, or for a massive object to move at the speed of light, it is not impossible for an object to exist which always moves faster than light. The hypothetical elementary particles that have this property are called tachyons.
Remember, Einstein was wrong on some of his statements. Never take today’s science for tomorrow’s results. Things change with knowledge (and it is ever changing).