Tenda AX1803 is a dual-band gigabit WIFI6 router from Tenda (China).Tenda AX1803 v1.0.0.1 1_2890 suffers from a denial of service vulnerability. The vulnerability stems from a boundary error in the ntpserve parameter when handling untrusted input. A remote attacker could exploit the vulnerability to cause a denial-of-service effect in the router.