Insecure Permission in MBS-Solutions X-Serie Gateway Firmware
CVE-2026-75166

8.8HIGH

Key Information:

Vendor

MBS-Solutions

Status
X-Serie Gateway Firmware
Vendor
CVE Published:
4 September 2026

What is CVE-2026-75166?

The MBS-Solutions X-Serie Gateway firmware version V6_00_05 is affected by an insecure permission vulnerability. This flaw allows a low-privileged service user to execute the /usr/bin/tcpdump command with root privileges without requiring a password. By exploiting the tcpdump -z option, an authenticated attacker can execute arbitrary commands on the system, potentially leading to unauthorized access and control. It is crucial for users of this firmware to assess their security posture and take appropriate measures to mitigate this risk.

References

https://en.mbs-solutions.de/mbs
https://en.mbs-solutions.de/xserie
https://github.com/SilviaMun/vulnerability-research/tree/...

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.