{"cve":{"cve_id":"CVE-2023-30756","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":0.00453,"epss_percentile":0.35964,"epss_as_of":"2026-06-23","description":"A vulnerability has been identified in SIMATIC CP 1242-7 V2 (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-1 (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-1 IEC (incl. SIPLUS variants) (All versions < V3.5.20), SIMATIC CP 1243-7 LTE (All versions < V3.5.20), SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0) (All versions < V3.5.20), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions), SIMATIC IPC DiagBase (All versions), SIMATIC IPC DiagMonitor (All versions), SIMATIC WinCC Runtime Advanced (All versions), SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0) (All versions < V2.4.8), TIM 1531 IRC (6GK7543-1MX00-0XE0) (All versions < V2.4.8). The web server of the affected devices do not properly handle certain errors when using the Expect HTTP request header, resulting in NULL dereference.\r\n\r\nThis could allow a remote attacker with no privileges to cause a denial of service condition in the system.","published_at":"2024-09-10T09:33:40.640000Z","last_modified_at":null,"cvss_v3_score":5.9,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C","cvss_v3_severity":"MEDIUM","cvss_v4_score":8.2,"cvss_v4_vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","cvss_v4_severity":"HIGH","ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":false,"ssvc_technical_impact":"partial","cwes":["CWE-476"],"nvd_references":["https://cert-portal.siemens.com/productcert/html/ssa-423808.html"],"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":"2026-06-29T01:30:25.178791Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"H","value_label":"High"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"},{"metric":"E","name":"E","value":"P","value_label":"Physical"},{"metric":"RL","name":"RL","value":"O","value_label":"O"},{"metric":"RC","name":"RC","value":"C","value_label":"Changed"}]},"cvss_v4_decoded":{"version":"4.0","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"H","value_label":"High"},{"metric":"AT","name":"Attack Requirements","value":"N","value_label":"None"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"VC","name":"Confidentiality (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VI","name":"Integrity (Vulnerable System)","value":"N","value_label":"None"},{"metric":"VA","name":"Availability (Vulnerable System)","value":"H","value_label":"High"},{"metric":"SC","name":"Confidentiality (Subsequent System)","value":"N","value_label":"None"},{"metric":"SI","name":"Integrity (Subsequent System)","value":"N","value_label":"None"},{"metric":"SA","name":"Availability (Subsequent System)","value":"N","value_label":"None"}]},"affected":[{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"simatic-cp-1242-7-v2-incl.-siplus-variants","product_name":"SIMATIC CP 1242-7 V2 (incl. SIPLUS variants)","version_start":"0","version_start_inclusive":true,"version_end":"V3.5.20","version_end_inclusive":false,"cpe23_uri":"cve5:siemens:simatic-cp-1242-7-v2-incl.-siplus-variants:0:V3.5.20"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"simatic-cp-1243-1-dnp3-incl.-siplus-variants","product_name":"SIMATIC CP 1243-1 DNP3 (incl. SIPLUS variants)","version_start":"0","version_start_inclusive":true,"version_end":"V3.5.20","version_end_inclusive":false,"cpe23_uri":"cve5:siemens:simatic-cp-1243-1-dnp3-incl.-siplus-variants:0:V3.5.20"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"simatic-cp-1243-1-iec-incl.-siplus-variants","product_name":"SIMATIC CP 1243-1 IEC (incl. SIPLUS variants)","version_start":"0","version_start_inclusive":true,"version_end":"V3.5.20","version_end_inclusive":false,"cpe23_uri":"cve5:siemens:simatic-cp-1243-1-iec-incl.-siplus-variants:0:V3.5.20"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"simatic-cp-1243-1-incl.-siplus-variants","product_name":"SIMATIC CP 1243-1 (incl. SIPLUS variants)","version_start":"0","version_start_inclusive":true,"version_end":"V3.5.20","version_end_inclusive":false,"cpe23_uri":"cve5:siemens:simatic-cp-1243-1-incl.-siplus-variants:0:V3.5.20"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"simatic-cp-1243-7-lte","product_name":"SIMATIC CP 1243-7 LTE","version_start":"0","version_start_inclusive":true,"version_end":"V3.5.20","version_end_inclusive":false,"cpe23_uri":"cve5:siemens:simatic-cp-1243-7-lte:0:V3.5.20"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"simatic-cp-1243-8-irc","product_name":"SIMATIC CP 1243-8 IRC","version_start":"0","version_start_inclusive":true,"version_end":"V3.5.20","version_end_inclusive":false,"cpe23_uri":"cve5:siemens:simatic-cp-1243-8-irc:0:V3.5.20"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"simatic-hmi-comfort-panels-incl.-siplus-variants","product_name":"SIMATIC HMI Comfort Panels (incl. SIPLUS variants)","version_start":"All versions","version_start_inclusive":true,"version_end":"All versions","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:simatic-hmi-comfort-panels-incl.-siplus-variants:All versions:All versions"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"simatic-ipc-diagbase","product_name":"SIMATIC IPC DiagBase","version_start":"0","version_start_inclusive":true,"version_end":"*","version_end_inclusive":false,"cpe23_uri":"cve5:siemens:simatic-ipc-diagbase:0:*"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"simatic-ipc-diagmonitor","product_name":"SIMATIC IPC DiagMonitor","version_start":"All versions","version_start_inclusive":true,"version_end":"All versions","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:simatic-ipc-diagmonitor:All versions:All versions"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"simatic-wincc-runtime-advanced","product_name":"SIMATIC WinCC Runtime Advanced","version_start":"All versions","version_start_inclusive":true,"version_end":"All versions","version_end_inclusive":true,"cpe23_uri":"cve5:siemens:simatic-wincc-runtime-advanced:All versions:All versions"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"siplus-tim-1531-irc","product_name":"SIPLUS TIM 1531 IRC","version_start":"0","version_start_inclusive":true,"version_end":"V2.4.8","version_end_inclusive":false,"cpe23_uri":"cve5:siemens:siplus-tim-1531-irc:0:V2.4.8"},{"vendor_slug":"siemens","vendor_name":"Siemens","product_slug":"tim-1531-irc","product_name":"TIM 1531 IRC","version_start":"0","version_start_inclusive":true,"version_end":"V2.4.8","version_end_inclusive":false,"cpe23_uri":"cve5:siemens:tim-1531-irc:0:V2.4.8"}],"exploit_refs":[],"news":[],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-423808.html","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2024-09-10T09:33:40.640000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:28:06.953192Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:28:06.953192Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:28:06.953192Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:28:06.953192Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:28:06.953192Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:28:06.953192Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T01:30:25.178791Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:30:25.178791Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:30:25.178791Z","label":"SSVC decision revised","source":"vulnrichment"}]}