Akshay Wakhare and Mohammad Shaikh picked up seven wickets between them as Saurashtra, who conceded a 46-run lead, were bowled out for 189, with opener Snell Patel top scoring with 63.
Vidarbha lost Faiz Fazal early in chase of 144, but were driven by half-centuries from Sanjay Ramaswamy and Ganesh Satish as they completed the chase in 35 overs.
The loss meant Saurashtra were rooted to the bottom of the group.
Points: Vidarbha 3, Saurashtra 0.
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