SSA-686531 (Last Update: 2019-11-12): Hardware based manufacturing access on S7-1200

Published

2019-11-12 00:00:00 UTC

Summary

There is an access mode used during manufacturing of S7-1200 CPUs that allows additional diagnostic functionality. Using this functionality requires physical access to the UART interface during boot process.

Siemens is working on a solution and recommends specific countermeasures until the solution is available.