CVE-2021-28166

—

CVSS 3.1

6.5 medium

EPSS

<1%p60

Published

Apr 7, 2021 (Apr 7, 2021)

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.

Vendors: eclipse
Products: mosquitto
Weakness: CWE-476
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD CVE.org GitHub PoCs EPSS (1.0%)

In the news0 stories

No ingested article mentions this CVE yet.