A vulnerability was found in Siemens SIMATIC PCS, SIMATIC WinCC Runtime Professional and SIMATIC WinCC up to 9.1. It has been classified as critical. Affected is an unknown function of the component Login Dialog Box. The manipulation leads to buffer overflow.

This vulnerability is traded as CVE-2023-50821. An attack has to be approached locally. There is no exploit available.

It is recommended to apply a patch to fix this issue.