CVE-2016-7959 (simatic_step_7)
Siemens SIMATIC STEP 7 (TIA Portal) before 14 improperly stores pre-shared key data in TIA project files, which makes it easier for local users to obtain sensitive information by leveraging access to a file and conducting a brute-force attack.
Source: CVE-2016-7959 (simatic_step_7)