{"cve":{"cve_id":"CVE-2021-25676","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":0.0129,"epss_percentile":0.66493,"epss_as_of":"2026-06-23","description":"A vulnerability has been identified in RUGGEDCOM RM1224 (V6.3), SCALANCE M-800 (V6.3), SCALANCE S615 (V6.3), SCALANCE SC-600 (All Versions >= V2.1 and < V2.1.3). Multiple failed SSH authentication attempts could trigger a temporary Denial-of-Service under certain conditions. When triggered, the device will reboot automatically.","published_at":"2021-03-15T17:03:31Z","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-307"],"nvd_references":["https://cert-portal.siemens.com/productcert/pdf/ssa-296266.pdf","https://us-cert.cisa.gov/ics/advisories/icsa-21-068-02"],"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":"2026-06-28T23:15:16.213984Z"},"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":"ruggedcom-rm1224","product_name":"RUGGEDCOM RM1224","version_start":"V6.3","version_start_inclusive":true,"version_end":"V6.3","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:ruggedcom-rm1224:V6.3:V6.3"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"scalance-m-800","product_name":"SCALANCE M-800","version_start":"V6.3","version_start_inclusive":true,"version_end":"V6.3","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:scalance-m-800:V6.3:V6.3"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"scalance-s615","product_name":"SCALANCE S615","version_start":"V6.3","version_start_inclusive":true,"version_end":"V6.3","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:scalance-s615:V6.3:V6.3"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"scalance-sc-600","product_name":"SCALANCE SC-600","version_start":"All Versions >= V2.1 and < V2.1.3","version_start_inclusive":true,"version_end":"All Versions >= V2.1 and < V2.1.3","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:scalance-sc-600:All Versions >= V2.1 and < V2.1.3:All Versions >= V2.1 and < V2.1.3"}],"exploit_refs":[],"news":[],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-296266.pdf","source_type":"MISC","tags":[]},{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-068-02","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2021-03-15T17:03:31Z","label":"CVE published","source":null}]}