# CVE-2026-35080: MBS Universal Gateway arbitrary file deletion in ugw-restoreinfo

Source: https://junglewise.ai/threats/cve-2026-35080-mbs-universal-gateway-arbitrary-file-deletion-in-ugw-restoreinfo  
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-2026-35080 · Severity: high · CVSS 8.1 · Published 2026-06-03

MBS Universal Gateways are devices used in building automation to connect different communication protocols. A security flaw in the web management interface allows a logged-in user to delete any file on the device's local storage. This could lead to a loss of critical configuration data or cause the device to stop functioning correctly.

Technologies: [MBS GmbH Universal Gateway Firmware](https://junglewise.ai/threats/technologies/universal-gateway-firmware). Vendors: [MBS GmbH](https://junglewise.ai/threats/vendors/mbs-gmbh).

## Quick answers

**Is CVE-2026-35080 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-35080 being exploited in the wild.

**How severe is CVE-2026-35080?** High severity, with a CVSS score of 8.1, published 3 June 2026.

**Which products and versions are affected?** MBS GmbH Universal Gateway (UGW) Firmware < V6_0_0_7.

**Is there a fix for CVE-2026-35080?** A patch was published on 2026-06-03: Fixed in firmware version V6_0_0_7 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-35080 attacked?** It is attacked over the network, in device firmware.

**Am I affected by CVE-2026-35080?** Check whether you run MBS GmbH Universal Gateway Firmware. 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 arbitrary file deletion vulnerability exists in the MBS Universal Gateway (UGW) web GUI. The flaw is located within the 'ugw-restoreinfo' CGI method, which fails to properly validate user-controlled input used in file path operations (CWE-73). A remote attacker with authenticated user privileges can exploit this by sending crafted requests to delete arbitrary local files on the filesystem. This can lead to a denial of service or loss of system integrity. The vulnerability is addressed in firmware version V6_0_0_7.

## Affected products

- MBS GmbH Universal Gateway (UGW) Firmware < V6_0_0_7

## Timeline

- 2026-06-03: disclosed
- 2026-06-03: advisory
- 2026-06-03: patched: Fixed in firmware version V6_0_0_7

## References

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

## Related threats

- [MBS Universal Gateway stack buffer overflow in gdv-serverconfig](https://junglewise.ai/threats/cve-2026-35085-mbs-universal-gateway-stack-buffer-overflow-in-gdv-serverconfig)
- [MBS Universal Gateway stack buffer overflow in dali-devconfig](https://junglewise.ai/threats/cve-2026-35084-mbs-universal-gateway-stack-buffer-overflow-in-dali-devconfig)
- [MBS Universal Gateway stack buffer overflow in web GUI](https://junglewise.ai/threats/cve-2026-35083-mbs-universal-gateway-stack-buffer-overflow-in-web-gui)
- [MBS Universal Gateway arbitrary file deletion in ugw-restore](https://junglewise.ai/threats/cve-2026-35079-mbs-universal-gateway-arbitrary-file-deletion-in-ugw-restore)
- [MBS Universal Gateway arbitrary file deletion in ugw-delete-file](https://junglewise.ai/threats/cve-2026-35077-mbs-universal-gateway-arbitrary-file-deletion-in-ugw-delete-file)