The SCALANCE W1750D devices contain multiple vulnerabilities that could allow an attacker to inject commands or exploit buffer overflow vulnerabilities which could lead to sensitive information disclosure, unauthenticated denial of service or unauthenticated remote code execution.
Siemens has released new versions for the affected products and recommends to update to the latest versions.

https://cert-portal.siemens.com/productcert/html/ssa-716164.html