Microwave caramels and water in medium microwaveable bowl on HIGH 30 sec.; stir until caramels are completely melted. Cool 2 min. Stir in sour cream and 1/2 tsp. cinnamon. Refrigerate until ready to use.
Whisk cream cheese, pumpkin, brown sugar, flour, zest and remaining cinnamon until blended; spoon about 2 tsp. onto center of each won ton wrapper. Moisten edges with egg white; fold diagonally in half. Pinch edges together tightly to seal.
Heat oil in large saucepan on medium-high heat to 350F.
Add won tons, in batches; cook 2 to 3 min. or until evenly browned.