Quick answers
- Is CVE-2026-35077 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-35077 being exploited in the wild.
- How severe is CVE-2026-35077?
- 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-2026-35077?
- 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-2026-35077 attacked?
- It is attacked over the network, in device firmware.
- Am I affected by CVE-2026-35077?
- 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
A path traversal or external control of file name vulnerability (CWE-73) exists in the 'ugw-delete-file' CGI method of the MBS Universal Gateway (UGW) web GUI. The component fails to properly validate user-supplied input before using it in file deletion operations. An authenticated remote attacker with standard user privileges can exploit this to delete arbitrary files on the local filesystem. This can result in a denial of service by removing critical system files or the loss of sensitive configuration data. 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