A vulnerability was discovered in Siemens OZW672 (all versions) and OZW772 (all versions) that could allow an attacker to read and manipulate data in TLS sessions while performing a man-in-the-middle (MITM) attack on the integrated web server on port 443/tcp.
https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-563539.pdf
https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-563539.pdf