A vulnerability was identified in OPC Foundation Local Discovery Server which also affects Siemens products that could allow an attacker to escalate privileges under certain circumstances.
Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens is preparing further fix versions and recommends specific countermeasures for products where fixes are not, or not yet available.

https://cert-portal.siemens.com/productcert/html/ssa-691715.html