Managing A Non-Acknowledgement Message (NACK) Attack

Various embodiments include methods and computing devices implementing such methods for detecting and responding to a non-acknowledgment message (NACK) attack. In some embodiments, a device vehicle processing system may perform an operation to determine whether a NACK attacker is present in response to a quantity of NACK messages received within a time interval exceeding a threshold quantity that is based on a vehicle communication environment proximate to the vehicle. The vehicle processing system may perform an operation to mitigate adverse effects of NACK messages received from the NACK attacker in response to determining that the NACK attacker is present.