Newcastle are once again being linked with the striker, but Manchester United are rumoured to be ready to test the Hammers' resolve to keep Ashton by tabling an £8million bid for the England prospect this summer.
Curbishley is determined to keep Ashton but a big offer could tempt the board to sell.
Ashton: "As far as I know I'll be at West Ham. The only worry is that the club haven't spoken to me yet so I don't know where I stand.
"Obviously I'd like to speak to the club about my future. I'd just like to know where my future lies.
"Obviously I had to prove myself after spending so long out injured and I feel I've done that now.
"West Ham is the team I play for. I want to talk to the club because I've really enjoyed myself here and that's all I'm really thinking about.
"A lot has been written about me but the thing I'm most worried about is what West Ham think of me.
"I suppose it (Ferguson's praise) is flattering but you don't really read a lot into what goes into the papers."