CVE-2019-16754

Name: CVE-2019-16754
Creator: NVD / NIST
Published: 2019-09-24T18:15:11.11+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.47%

Last modified Jun 17, 2026

CVE-2019-16754 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.47% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.47%

70.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Riot-Os	Riot	2019.07

References

https://github.com/RIOT-OS/RIOT/pull/12293Exploit, Patch, Third Party Advisory
https://github.com/RIOT-OS/RIOT/pull/12293Exploit, Patch, Third Party Advisory

Timeline

Published: Sep 24, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-16754?

How severe is CVE-2019-16754?

CVE-2019-16754 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.47% probability of exploitation in the next 30 days.

How do I fix CVE-2019-16754?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-16754?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST