Ganguly was included in the 15-man Indian squad for Friday's first Test against Sri Lanka in Chennai on a 3-2 verdict by the selectors following a four-hour meeting last week.
His backers, Pranob Roy, Yashpal Sharma and Gopal Sharma were all removed from the panel on Tuesday after political heavyweight Sharad Pawar wrested control of the Indian cricket board from Jagmohan Dalmiya.
The trio was replaced by Ranjib Biswal, Sanjay Jagdale and Bhupinder Singh, none of whom have played Test cricket.
Former Test wicket-keeper Kiran More was retained as chief selector and V.B. Chandrasekhar also held on to his job. Both had opposed Ganguly's return to the Test squad.
It is unclear whether Ganguly, who was replaced as captain by Rahul Dravid, will be picked in the playing eleven for the Chennai Test.
The left-hander has scored 5,066 runs in 84 Tests with 12 centuries, besides taking 25 wickets.
Ganguly was dropped from the One-day side due to poor form, an elbow injury and a damaging public spat with coach Greg Chappell, who termed him unfit to lead India in a leaked e-mail to the Indian board.
Dravid's men thrashed Sri Lanka 6-1 and drew with South Africa 2-2 in two One-day home series this month.