CVE-2019-16754: Riot-OS Riot

High severity, CVSS 7.5. EPSS: 1.5% chance of exploitation in the next 30 days.

RIOT 2019.07 contains a NULL pointer dereference in the MQTT-SN implementation (asymcute), potentially allowing an attacker to crash a network node running RIOT. This requires spoofing an MQTT server response. To do so, the attacker needs to know the MQTT MsgID of a pending MQTT protocol message and the ephemeral port used by RIOT's MQTT implementation. Additionally, the server IP address is required for spoofing the packet.

Affected products

• Riot-OS Riot: version 2019.07 only

Published 2019-09-24. Last modified 2026-06-17.