# CVE-2026-75162: MBS X-Serie Gateway OPC-UA credential disclosure

Source: https://junglewise.ai/threats/cve-2026-75162-mbs-x-serie-gateway-opc-ua-credential-disclosure  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-04. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-75162 · Severity: medium · CVSS 6.5 · Published 2026-09-04

The MBS X-Serie Gateway is a universal industrial gateway used to bridge building automation protocols like KNX, PROFIBUS, and OPC-UA. A vulnerability in the gateway's web configuration interface allows any authenticated user—even those with basic Standard role permissions—to retrieve OPC-UA authentication credentials in plaintext. An attacker with valid (low-privilege) credentials could extract sensitive authentication tokens and use them to compromise OPC-UA systems connected to the gateway.

## Quick answers

**Is CVE-2026-75162 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-75162 being exploited in the wild.

**How severe is CVE-2026-75162?** Medium severity, with a CVSS score of 6.5, published 4 September 2026.

**Which products and versions are affected?** MBS X-Serie Gateway V6_00_05.

**Is there a fix for CVE-2026-75162?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-75162 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-75162?** Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is an information disclosure flaw in the opcua-configuration method of /cgi-bin/wwwugw.cgi in MBS X-Serie Gateway firmware V6_00_05. A remote authenticated user with Standard role privileges can query the JSON API endpoint to retrieve OPC-UA authentication credentials in cleartext, exposing sensitive authentication material. The vulnerability requires valid authentication credentials to access the vulnerable endpoint, but the low-privileged Standard role is sufficient to exploit it. An attacker with valid user credentials could extract OPC-UA authentication secrets and pivot to compromise downstream building automation systems. Patch availability and fix details are not specified in the advisory.

## Affected products

- MBS X-Serie Gateway V6_00_05

## Timeline

- 2026-09-04: disclosed
- 2026-09-04: advisory

## References

- [https://en.mbs-solutions.de/mbs](https://en.mbs-solutions.de/mbs)
- [https://en.mbs-solutions.de/xserie](https://en.mbs-solutions.de/xserie)