Affected: Siemens SIMATIC PCS neo V4.0, Siemens SIMATIC STEP 7 V16, Siemens SIMATIC STEP 7 V17, Siemens SIMATIC STEP 7 V18, siemens simatic_pcs_neo, siemens simatic_step_7

A vulnerability has been identified in SIMATIC PCS neo V4.0 (All versions), SIMATIC STEP 7 V16 (All versions), SIMATIC STEP 7 V17 (All versions), SIMATIC STEP 7 V18 (All versions < V18 Update 2). Affected applications do not properly restrict the .NET BinaryFormatter when deserializing user-controllable input. This could allow an attacker to cause a type confusion and execute arbitrary code within the affected application. This is the same issue that exists for .NET BinaryFormatter https://docs.microsoft.com/en-us/visualstudio/code-quality/ca2300.