.

There is no official backdoor. However, a vulnerability was discovered in some older firmware versions which had the hard-coded credentials username: Basisk and password: Basisk for a debug interface. Siemens has since released updates to remove this.

Writing raw bytes back to the MMC can corrupt the PLC's internal operating system, causing a solid red "SF" (System Fault) LED.

How do you reset a SIMATIC S7-300 CPU and MMC (default ... - Support

Release and immediately flick it back to within 3 seconds. The STOP LED will blink while the memory is wiped.

Siemens S7 300 Password Unlock Exclusive

There is no official backdoor. However, a vulnerability was discovered in some older firmware versions which had the hard-coded credentials username: Basisk and password: Basisk for a debug interface. Siemens has since released updates to remove this.

Writing raw bytes back to the MMC can corrupt the PLC's internal operating system, causing a solid red "SF" (System Fault) LED. siemens s7 300 password unlock exclusive

How do you reset a SIMATIC S7-300 CPU and MMC (default ... - Support There is no official backdoor

Release and immediately flick it back to within 3 seconds. The STOP LED will blink while the memory is wiped. There is no official backdoor. However