A vulnerability classified as problematic was found in Teldat Regesta Smart HD-PLC up to 11.02.05.10.02. This affects an unknown part of the file /upgrade/query.php of the component Configuration File Handler. The manipulation of the argument Hostname results in cross site scripting.
This vulnerability was named CVE-2026-27870. The attack may be performed from remote. There is no available exploit.
Upgrading the affected component is advised.
