{"cve":{"cve_id":"CVE-2021-25668","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":0.01569,"epss_percentile":0.72151,"epss_as_of":"2026-06-23","description":"A vulnerability has been identified in SCALANCE X200-4P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT (All versions < 5.5.1), SCALANCE X201-3P IRT PRO (All versions < 5.5.1), SCALANCE X202-2 IRT (All versions < 5.5.1), SCALANCE X202-2P IRT (incl. SIPLUS NET variant) (All versions < 5.5.1), SCALANCE X202-2P IRT PRO (All versions < 5.5.1), SCALANCE X204 IRT (All versions < 5.5.1), SCALANCE X204 IRT PRO (All versions < 5.5.1), SCALANCE X204-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X204-2FM (All versions < V5.2.5), SCALANCE X204-2LD (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X204-2LD TS (All versions < V5.2.5), SCALANCE X204-2TS (All versions < V5.2.5), SCALANCE X206-1 (All versions < V5.2.5), SCALANCE X206-1LD (All versions < V5.2.5), SCALANCE X208 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X208PRO (All versions < V5.2.5), SCALANCE X212-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE X212-2LD (All versions < V5.2.5), SCALANCE X216 (All versions < V5.2.5), SCALANCE X224 (All versions < V5.2.5), SCALANCE XF201-3P IRT (All versions < 5.5.1), SCALANCE XF202-2P IRT (All versions < 5.5.1), SCALANCE XF204 (All versions < V5.2.5), SCALANCE XF204 IRT (All versions < 5.5.1), SCALANCE XF204-2 (incl. SIPLUS NET variant) (All versions < V5.2.5), SCALANCE XF204-2BA IRT (All versions < 5.5.1), SCALANCE XF206-1 (All versions < V5.2.5), SCALANCE XF208 (All versions < V5.2.5). Incorrect processing of POST requests in the webserver may result in write out of bounds in heap. An attacker might leverage this to cause denial-of-service on the device and potentially remotely execute code.","published_at":"2021-04-22T20:42:20Z","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-122"],"nvd_references":["https://cert-portal.siemens.com/productcert/pdf/ssa-187092.pdf"],"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":"scalance-x200-4p-irt","product_name":"SCALANCE X200-4P IRT","version_start":"All versions < 5.5.1","version_start_inclusive":true,"version_end":"All versions < 5.5.1","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:scalance-x200-4p-irt:All versions < 5.5.1:All versions < 5.5.1"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"scalance-x201-3p-irt","product_name":"SCALANCE X201-3P IRT","version_start":"All versions < 5.5.1","version_start_inclusive":true,"version_end":"All versions < 5.5.1","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:scalance-x201-3p-irt:All versions < 5.5.1:All versions < 5.5.1"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"scalance-x201-3p-irt-pro","product_name":"SCALANCE X201-3P IRT PRO","version_start":"All versions < 5.5.1","version_start_inclusive":true,"version_end":"All versions < 5.5.1","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:scalance-x201-3p-irt-pro:All versions < 5.5.1:All versions < 5.5.1"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"scalance-x202-2-irt","product_name":"SCALANCE X202-2 IRT","version_start":"All versions < 5.5.1","version_start_inclusive":true,"version_end":"All versions < 5.5.1","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:scalance-x202-2-irt:All versions < 5.5.1:All versions < 5.5.1"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"scalance-x202-2p-irt-incl.-siplus-net-variant","product_name":"SCALANCE X202-2P IRT (incl. 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