A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.3), Nucleus Source Code (All versions). By sending specially crafted DHCP packets to a device where the DHCP client is enabled, an attacker could change the IP address of the device to an invalid value.
https://us-cert.cisa.gov/ics/advisories/icsa-20-105-06
https://cert-portal.siemens.com/productcert/pdf/ssa-434032.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-162506.pdf
https://cert-portal.siemens.com/productcert/html/ssa-434032.html
https://cert-portal.siemens.com/productcert/html/ssa-162506.html