Affected devices do not properly validate the authentication when performing certain modifications in the web interface allowing an authenticated attacker to influence the user interface configured by an administrator.
https://cert-portal.siemens.com/productcert/pdf/ssa-699386.pdf
https://cert-portal.siemens.com/productcert/pdf/ssa-180704.pdf
https://cert-portal.siemens.com/productcert/html/ssa-699386.html
https://cert-portal.siemens.com/productcert/html/ssa-602936.html
https://cert-portal.siemens.com/productcert/html/ssa-180704.html