I work out three times a week, using a full body workout plan, doing one leg exercise each time (squats, lunges, deadlifts, with the largest weight I can lift, so it's quite challenging). Two-three times a week I also do cardio in the form of HIIT to maintain/decrease my body fat, either running or using a stationary bike. It's short (around 20 minutes), but rather intense (8-12 intervals).
The question is, can these sessions cause overtraining with respect to my legs? Basically I use my legs quite intensively 5-6 days a week, so might the cardio days prevent them to get enough rest between two workout days?