{"cve":"CVE-2020-28393","nvd":{"published":"2021-05-12T14:15:11.083","modified":"2026-06-17T03:10:22.393","status":"Modified","description":"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).","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-682"],"references":["https://cert-portal.siemens.com/productcert/pdf/ssa-116379.pdf","https://us-cert.cisa.gov/ics/advisories/icsa-21-131-10","https://cert-portal.siemens.com/productcert/pdf/ssa-116379.pdf","https://us-cert.cisa.gov/ics/advisories/icsa-21-131-10"],"products":["siemens:scalance_xm-400_firmware","siemens:scalance_xm408-4c_firmware","siemens:scalance_xm408-4c_l3_firmware","siemens:scalance_xm408-8c_firmware","siemens:scalance_xm408-8c_l3_firmware","siemens:scalance_xm416-4c_firmware","siemens:scalance_xm416-4c_l3_firmware","siemens:scalance_xr524_firmware","siemens:scalance_xr526_firmware","siemens:scalance_xr528_firmware","siemens:scalance_xr552_firmware"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2020-28393","score":0.01629,"percentile":0.76209,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}