{"cve":{"cve_id":"CVE-2020-28391","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.01119,"epss_percentile":0.61914,"epss_as_of":"2026-06-23","description":"A vulnerability has been identified in SCALANCE X-200 switch family (incl. SIPLUS NET variants) (All versions < V5.2.5), SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) (All versions < V5.5.0), SCALANCE X-200RNA switch family (All versions < V3.2.7). Devices create a new unique key upon factory reset, except when used with C-PLUG. When used with C-PLUG the devices use the hardcoded private RSA-key shipped with the firmware-image. An attacker could leverage this situation to a man-in-the-middle situation and decrypt previously captured traffic.","published_at":"2021-01-12T00:00:00Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-321"],"nvd_references":["https://cert-portal.siemens.com/productcert/pdf/ssa-274900.pdf","https://us-cert.cisa.gov/ics/advisories/icsa-21-012-02"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:14:05.614470Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"scalance-x-200irt-switch-family-incl.-siplus-net-variants","product_name":"SCALANCE X-200IRT switch family (incl. SIPLUS NET variants)","version_start":"All versions < V5.5.0","version_start_inclusive":true,"version_end":"All versions < V5.5.0","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:scalance-x-200irt-switch-family-incl.-siplus-net-variants:All versions < V5.5.0:All versions < V5.5.0"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"scalance-x-200rna-switch-family","product_name":"SCALANCE X-200RNA switch family","version_start":"All versions < V3.2.7","version_start_inclusive":true,"version_end":"All versions < V3.2.7","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:scalance-x-200rna-switch-family:All versions < V3.2.7:All versions < V3.2.7"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"scalance-x-200-switch-family-incl.-siplus-net-variants","product_name":"SCALANCE X-200 switch family (incl. SIPLUS NET variants)","version_start":"All versions < V5.2.5","version_start_inclusive":true,"version_end":"All versions < V5.2.5","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:scalance-x-200-switch-family-incl.-siplus-net-variants:All versions < V5.2.5:All versions < V5.2.5"}],"exploit_refs":[],"news":[],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-274900.pdf","source_type":"MISC","tags":[]},{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-012-02","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2021-01-12T00:00:00Z","label":"CVE published","source":null}]}