CVE-2020-28393
An unauthenticated remote attacker could create a permanent denial-of-service condition by sending specially crafted OSPF packets. Successful exploitation requires OSPF to be enabled on an affected device on the SCALANCE XM-400, XR-500 (All versions prior to v6.4).
Date published : 2021-05-12
https://cert-portal.siemens.com/productcert/pdf/ssa-116379.pdf