Affected devices do not properly authorize the change password function of the web interface. This could allow low privileged users to escalate their privileges.
https://www.cisa.gov/news-events/ics-advisories/icsa-26-111-07
https://cert-portal.siemens.com/productcert/html/ssa-019200.html
https://cert-portal.siemens.com/productcert/pdf/ssa-552702.pdf
https://cert-portal.siemens.com/productcert/html/ssa-552702.html