Is CBI Director 'untouchable' for his actions, asks SC

Does the CBI Director have such protection that neither the Centre nor the CVC can touch him for his any action during the fixed tenure of two years?
When senior advocates Fali Nariman and Dushyant Dave, appearing for Verma and an NGO, Common Cause respectively, argued that neither the Centre nor the Central Vigilance Commission (CVC) had any power to take disciplinary action against the CBI Director, a bench headed by Chief Justice Ranjan Gogoi asked: "Will that not make CBI Director virtually untouchable? Is that what Parliament intended?"
He argued that a 'transfer' actually amounts to a public casting of doubt on the CBI Director. "That's why legislature has drawn a ring fence around transfer by introducing the prior approval of the panel."

When Nariman was asked by the Bench "If the situation arises, can the court appoint a CBI Director, he said: "Yes, in its inherent powers, it can."