# CVE-2026-35075: MBS Universal Gateway hardcoded password in firmware

Source: https://junglewise.ai/threats/cve-2026-35075-mbs-universal-gateway-hardcoded-password-in-firmware  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-03. Updated: 2026-06-03  
License: CC BY 4.0 with a link back

CVE-2026-35075 · Severity: critical · CVSS 9.8 · Published 2026-06-03

MBS Universal Gateways, which are used to connect different building automation systems, contain a hardcoded password within their firmware. An unauthorized person can extract this password from the device software and use it to gain full administrative control over any affected gateway. This could allow an attacker to disrupt building operations, access sensitive configuration data, or compromise the entire local network.

Technologies: [MBS GmbH Universal Gateway A-Series Firmware](https://junglewise.ai/threats/technologies/universal-gateway-a-series-firmware), [MBS GmbH Universal Gateway X-Series Firmware](https://junglewise.ai/threats/technologies/universal-gateway-x-series-firmware). Vendors: [MBS GmbH](https://junglewise.ai/threats/vendors/mbs-gmbh).

## Quick answers

**Is CVE-2026-35075 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-35075 being exploited in the wild.

**How severe is CVE-2026-35075?** Critical severity, with a CVSS score of 9.8, published 3 June 2026.

**Which products and versions are affected?** MBS GmbH Universal Gateway A-Series Firmware < V6_0_0_7; MBS GmbH Universal Gateway X-Series Firmware < V6_0_0_7.

**Is there a fix for CVE-2026-35075?** A patch was published on 2026-06-03: Firmware version V6_0_0_7 released. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-35075 attacked?** It is attacked over the network, in device firmware.

**Am I affected by CVE-2026-35075?** Check whether you run MBS GmbH Universal Gateway A-Series Firmware or MBS GmbH Universal Gateway X-Series Firmware at an affected version. 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 (CWE-1393) exists in MBS Universal Gateway (UGW) A-Series and X-Series firmware versions prior to V6_0_0_7. A service account within the firmware uses a static, hardcoded password that can be recovered by analyzing the firmware image. Because this password is uniform across affected devices, an unauthenticated remote attacker can use it to gain unauthorized access with high privileges. This flaw significantly lowers the barrier for full system compromise. The vendor has released firmware version V6_0_0_7 to remediate this issue.

## Affected products

- MBS GmbH Universal Gateway A-Series Firmware < V6_0_0_7
- MBS GmbH Universal Gateway X-Series Firmware < V6_0_0_7

## Timeline

- 2026-06-03: disclosed
- 2026-06-03: advisory
- 2026-06-03: patched: Firmware version V6_0_0_7 released.

## References

- [https://www.certvde.com/en/advisories/VDE-2026-039/](https://www.certvde.com/en/advisories/VDE-2026-039/)

## Related threats

- [MBS Universal Gateway path traversal in ugw-logread](https://junglewise.ai/threats/cve-2026-35082-mbs-universal-gateway-path-traversal-in-ugw-logread)
- [MBS Universal Gateway arbitrary process termination in ugw-logstop](https://junglewise.ai/threats/cve-2026-35081-mbs-universal-gateway-arbitrary-process-termination-in-ugw)
- [MBS Universal Gateway arbitrary file deletion in ugw-logstop](https://junglewise.ai/threats/cve-2026-35078-mbs-universal-gateway-arbitrary-file-deletion-in-ugw-logstop)
- [MBS Universal Gateway arbitrary file deletion in bac-scanresult](https://junglewise.ai/threats/cve-2026-35076-mbs-universal-gateway-arbitrary-file-deletion-in-bac-scanresult)