Microwave ovens are designed with safety features to prevent radiation leaks. The window of a microwave oven typically has a metal mesh or grid pattern that prevents microwaves from escaping. If the window is damaged and the metal mesh is compromised, it is possible for some microwaves to leak out.
However, even if there is a small leak, it is unlikely to cause significant radiation exposure or radiation poisoning. Microwaves are non-ionizing radiation, which means they don't have enough energy to ionize atoms or molecules and cause damage to cells in the same way as ionizing radiation (such as X-rays or gamma rays).
That being said, it's still important to ensure that your microwave is in good working condition and has no visible damage. If you have concerns about the safety of your microwave or potential exposure to radiation, it is recommended to contact a professional for inspection or consult a healthcare provider for further advice.