---
id: CVE-2026-79391
title: No authentication exists in the MQTT service of Trueview 6.0.23.4
summary: >-
  No authentication exists in the MQTT service of Trueview 6.0.23.4. The MQTT
  broker accepts client connections on TCP port 1883 without requiring
  authentication, allowing a remote attacker with network access to establish an
  MQTT session …
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-306
published: '2026-09-04'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T16:04:24.933'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-79391'
references:
  - url: 'https://github.com/EmbdCDACHyd/CVE/blob/main/CVE-2026-79391/README.md'
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
epss: 0.00722
epssPercentile: 0.51943
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-08T14:04:17.477133Z'
ingestedAt: '2026-09-08T15:33:26.964Z'
---

## Overview

No authentication exists in the MQTT service of Trueview 6.0.23.4. The MQTT broker accepts client connections on TCP port 1883 without requiring authentication, allowing a remote attacker with network access to establish an MQTT session and perform unauthorized publish or subscribe operations.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.