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Vulnerability record · CVE-2018-17614 · published 13 November 2018

CVE-2018-17614: Losant arduino mqtt client stack-based buffer overflow vulnerability

Losant · Arduino Mqtt Client

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Losant Arduino MQTT Client prior to V2.7. User interaction is not required to exploit this vulnerability. The specific flaw exists within the parsing of MQTT PUBLISH packets. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-6436.

8.8 CVSS 3.0 High EPSS 9.7% · top 4.6% CWE-121 · Stack-based buffer overflowCWE-119 · Memory buffer overflow
8.8CVSS 3.0 base score, v2 5.8
9.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Losant Arduino MQTT Client prior to V2.7. User interaction is not required to exploit this vulnerability. The specific flaw exists within the parsing of MQTT PUBLISH packets. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-6436.

CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/knolleary/pubsubclient/releases/tag/v2.7 Release Notes
https://zerodayinitiative.com/advisories/ZDI-18-1337 Release NotesThird Party AdvisoryVDB Entry
https://github.com/knolleary/pubsubclient/releases/tag/v2.7 Release Notes
https://zerodayinitiative.com/advisories/ZDI-18-1337 Release NotesThird Party AdvisoryVDB Entry

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Source: NIST National Vulnerability Database (record CVE-2018-17614), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.