Is able to efficiently hydrolyze alpha-, beta-, and gamma-cyclomaltodextrins and linear maltooligosaccharides, to glucose and maltose, by decycling cyclodextrins and liberating glucose from the reducing end of the molecules. Shows a very weak activity on starch and pullulan. Cannot hydrolyze maltose or disaccharides with various types of alpha-links. Is not active against beta-glycosidic bonds of poly-, oligo-, and disaccharides