Preheat your oven to 350°F (175°C). Grease and flour a 10-inch Bundt pan.
In a medium bowl, whisk together the flour, baking powder, baking soda, and salt. Set aside.
In a large mixing bowl, cream the softened butter and granulated sugar together until light and fluffy, about 3-4 minutes.
Add the eggs one at a time, mixing well after each addition. Stir in the orange zest and vanilla extract.
Gradually add the dry ingredients to the butter mixture, alternating with the buttermilk and orange juice. Begin and end with the dry ingredients. Mix until just combined.
Fold in the chopped cranberries gently.
Pour the batter into the prepared Bundt pan and smooth the top.
Bake for 50-60 minutes, or until a toothpick inserted into the center comes out clean.
Allow the cake to cool in the pan for 15 minutes before inverting onto a wire rack to cool completely.