Null Pointer Dereference vulnerability in topicfiltern function in mqttparser.c in NanoMQ 0.21.7 allows attackers to cause a denial of service.
A heap-buffer-overflow vulnerability in the readbyte function in NanoMQ v.0.21.7 allows attackers to cause a denial of service via transmission of crafted hexstreams.
Buffer Overflow vulnerability in the getvarinteger function in mqttparser.c in NanoMQ 0.21.7 allows remote attackers to cause a denial of service via a series of specially crafted hexstreams.