# CVE-2026-35081: MBS Universal Gateway arbitrary process termination in ugw-logstop

Source: https://junglewise.ai/threats/cve-2026-35081-mbs-universal-gateway-arbitrary-process-termination-in-ugw  
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-2026-35081 · Severity: high · CVSS 8.1 · Published 2026-06-03

MBS Universal Gateways, which are used to connect different communication protocols in building automation systems, contain a vulnerability in their web management interface. An attacker with basic user credentials can exploit this flaw to shut down critical system processes. This could lead to a loss of control over building automation systems, resulting in operational downtime or a denial of service for connected infrastructure.

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-2026-35081 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-35081 being exploited in the wild.

**How severe is CVE-2026-35081?** High severity, with a CVSS score of 8.1, 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-2026-35081?** 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-2026-35081 attacked?** It is attacked over the network, in device firmware.

**Am I affected by CVE-2026-35081?** 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

An improper input validation vulnerability (CWE-20) exists in the 'ugw-logstop' CGI method of the MBS Universal Gateway (UGW) web GUI. The vulnerability stems from insufficient validation of user-supplied input passed to the method, which is used to manage logging processes. A remote attacker with low-level user privileges can exploit this by sending a specially crafted network request to terminate arbitrary processes on the underlying operating system. This can lead to a significant denial-of-service condition or the disabling of security-critical services. The issue is resolved in firmware version V6_0_0_7.

## Affected products

- MBS GmbH Universal Gateway (UGW) A-Series Firmware < V6_0_0_7
- MBS GmbH Universal Gateway (UGW) X-Series Firmware < V6_0_0_7

## Timeline

- 2026-06-03: advisory: Initial advisory published by CERT@VDE
- 2026-06-03: disclosed: CVE-2026-35081 published to NVD

## 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 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)
- [MBS Universal Gateway hardcoded password in firmware](https://junglewise.ai/threats/cve-2026-35075-mbs-universal-gateway-hardcoded-password-in-firmware)