In Sprecher Automation SPRECON-E-C/P/T3 CPU in variant PU244x a vulnerable firmware verification has been identified. Through physical access and hardware manipulation, an attacker might be able to bypass hardware-based code verification and thus inject and execute arbitrary code and gain full access of the device.
https://www.sprecher-automation.com/fileadmin/itSecurity/PDF/2022-12_Advisories.pdf