Attorney General Eric Schneiderman, largely unknown by voters, is “potentially vulnerable” at the polls, according to a poll released Tuesday by Siena College.

But pollster Steven Greenberg said it’s way too early to say the incumbent Democrat is in trouble since the election is six months away and the Republicans have yet to field a candidate. John Cahill, a former top advisor to Gov. George Pataki, is considering a campaign but has yet to formally announce his intentions.

The Siena poll showed that Schneiderman is viewed favorably by 27 percent of voters and unfavorably by 20 percent while 53 percent had no opinion. Only 35 percent said they are inclined to re-elect Schneiderman, and 32 percent indicated they would prefer someone else. Schneiderman’s numbers largely mirror those of Comptroller Thomas DiNapoli, who is also without a confirmed opponent.

Siena also polled voters about several other individuals and issues. It found that Gov. Andrew Cuomo holds a two-to-one lead over Westchester County Executive Rob Astorino in a two-way race. However, if it becomes a three-way contest with a Working Families Party or other liberal candidate, Cuomo’s lead over Astorino falls from 58-to-28 percent to 39-to-24 percent, according to the poll.