---
id: CVE-2026-75166
title: >-
  Insecure Permission vulnerability in MBS-Solutions X-Serie Gateway firmware
  V6_00_05 allows the low-privileged service user to execute /usr/bin/tcpdump as
  root without a password
summary: >-
  Insecure Permission vulnerability in MBS-Solutions X-Serie Gateway firmware
  V6_00_05 allows the low-privileged service user to execute /usr/bin/tcpdump as
  root without a password. By leveraging the tcpdump -z option, an authenticated
  att…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-269
  - CWE-276
published: '2026-09-04'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T20:20:34.103'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75166'
references:
  - url: 'https://en.mbs-solutions.de/mbs'
    label: cve@mitre.org
  - url: 'https://en.mbs-solutions.de/xserie'
    label: cve@mitre.org
  - url: >-
      https://github.com/SilviaMun/vulnerability-research/tree/main/CVE-2026-75166
    label: cve@mitre.org
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-09T19:49:43.867291Z'
epss: 0.00494
epssPercentile: 0.41492
ingestedAt: '2026-09-09T16:14:05.518Z'
---

## Overview

Insecure Permission vulnerability in MBS-Solutions X-Serie Gateway firmware V6_00_05 allows the low-privileged service user to execute /usr/bin/tcpdump as root without a password. By leveraging the tcpdump -z option, an authenticated attacker can achieve arbitrary command execution.

## Remediation

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