CVE-2021-28166

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

In Eclipse Mosquitto version 2.0.0 to 2.0.9, if an authenticated client that had connected with MQTT v5 sent a crafted CONNACK message to the broker, a NULL pointer dereference would occur.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-476

Affected software

VendorProductVersions
The Eclipse FoundationEclipse Mosquitto>= 2.0, < unspecified; >= unspecified, <= 2.0.9

References

Timeline

Published
Apr 7, 2021
Last modified
Jun 17, 2026
NVD status
Modified

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CVE-2021-28166: Medium severity, CVSS 6.5 | Vulnix