{"api_version":"1","generated_at":"2026-06-13T15:22:41+00:00","cve":"CVE-2025-40944","urls":{"html":"https://cve.report/CVE-2025-40944","api":"https://cve.report/api/cve/CVE-2025-40944.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-40944","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-40944"},"summary":{"title":"CVE-2025-40944","description":"A vulnerability has been identified in SIMATIC ET 200AL IM 157-1 PN (6ES7157-1AB00-0AB0) (All versions), SIMATIC ET 200MP IM 155-5 PN HF (6ES7155-5AA00-0AC0) (All versions >= V4.2.0), SIMATIC ET 200SP IM 155-6 MF HF (6ES7155-6MU00-0CN0) (All versions), SIMATIC ET 200SP IM 155-6 PN HA (incl. SIPLUS variants) (All versions < V1.3), SIMATIC ET 200SP IM 155-6 PN R1 (6ES7155-6AU00-0HM0) (All versions < V6.0.1), SIMATIC ET 200SP IM 155-6 PN/2 HF (6ES7155-6AU01-0CN0) (All versions >= V4.2.0 < V4.2.5), SIMATIC ET 200SP IM 155-6 PN/3 HF (6ES7155-6AU30-0CN0) (All versions < V4.2.2), SIMATIC PN/MF Coupler (6ES7158-3MU10-0XA0) (All versions), SIMATIC PN/PN Coupler (6ES7158-3AD10-0XA0) (All versions < V6.0.0), SIPLUS ET 200MP IM 155-5 PN HF (6AG1155-5AA00-2AC0) (All versions >= V4.2.0), SIPLUS ET 200MP IM 155-5 PN HF (6AG1155-5AA00-7AC0) (All versions >= V4.2.0), SIPLUS ET 200MP IM 155-5 PN HF T1 RAIL (6AG2155-5AA00-1AC0) (All versions >= V4.2.0), SIPLUS ET 200SP IM 155-6 PN HF (6AG1155-6AU01-2CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS ET 200SP IM 155-6 PN HF (6AG1155-6AU01-7CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS ET 200SP IM 155-6 PN HF T1 RAIL (6AG2155-6AU01-1CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS ET 200SP IM 155-6 PN HF TX RAIL (6AG2155-6AU01-4CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS NET PN/PN Coupler (6AG2158-3AD10-4XA0) (All versions < V6.0.0). Affected devices do not properly handle S7 protocol session disconnect requests. When receiving a valid S7 protocol Disconnect Request (COTP DR TPDU) on TCP port 102, the devices enter an improper session state.\r\n\r\nThis could allow an attacker to cause the device to become unresponsive, leading to a denial-of-service condition that requires a power cycle to restore normal operation.","state":"PUBLISHED","assigner":"siemens","published_at":"2026-01-13 10:15:58","updated_at":"2026-06-09 10:16:37"},"problem_types":["CWE-400","CWE-400 CWE-400: Uncontrolled Resource Consumption"],"metrics":[{"version":"4.0","source":"productcert@siemens.com","type":"Secondary","score":"8.7","severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","data":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":8.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}},{"version":"4.0","source":"CNA","type":"DECLARED","score":"8.7","severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","data":{"baseScore":8.7,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"}},{"version":"3.1","source":"productcert@siemens.com","type":"Secondary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-674753.html","name":"https://cert-portal.siemens.com/productcert/html/ssa-674753.html","refsource":"productcert@siemens.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-40944","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-40944","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Siemens","product":"SIMATIC ET 200AL IM 157-1 PN","version":"affected * custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIMATIC ET 200MP IM 155-5 PN HF","version":"affected V4.2.0 * custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIMATIC ET 200SP IM 155-6 MF HF","version":"affected * custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIMATIC ET 200SP IM 155-6 PN HA (incl. SIPLUS variants)","version":"affected V1.3 custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIMATIC ET 200SP IM 155-6 PN R1","version":"affected V6.0.1 custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIMATIC ET 200SP IM 155-6 PN/2 HF","version":"affected V4.2.0 V4.2.5 custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIMATIC ET 200SP IM 155-6 PN/3 HF","version":"affected V4.2.2 custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIMATIC PN/MF Coupler","version":"affected * custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIMATIC PN/PN Coupler","version":"affected V6.0.0 custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIPLUS ET 200MP IM 155-5 PN HF","version":"affected V4.2.0 * custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIPLUS ET 200MP IM 155-5 PN HF","version":"affected V4.2.0 * custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIPLUS ET 200MP IM 155-5 PN HF T1 RAIL","version":"affected V4.2.0 * custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIPLUS ET 200SP IM 155-6 PN HF","version":"affected V4.2.0 V4.2.5 custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIPLUS ET 200SP IM 155-6 PN HF","version":"affected V4.2.0 V4.2.5 custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIPLUS ET 200SP IM 155-6 PN HF T1 RAIL","version":"affected V4.2.0 V4.2.5 custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIPLUS ET 200SP IM 155-6 PN HF TX RAIL","version":"affected V4.2.0 V4.2.5 custom","platforms":[]},{"source":"CNA","vendor":"Siemens","product":"SIPLUS NET PN/PN Coupler","version":"affected V6.0.0 custom","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2025","cve_id":"40944","cve":"CVE-2025-40944","epss":"0.000150000","percentile":"0.034100000","score_date":"2026-06-12","updated_at":"2026-06-13 00:07:16"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2025-40944","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-01-13T17:20:16.564311Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-01-13T17:21:36.848Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unknown","product":"SIMATIC ET 200AL IM 157-1 PN","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC ET 200MP IM 155-5 PN HF","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V4.2.0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC ET 200SP IM 155-6 MF HF","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC ET 200SP IM 155-6 PN HA (incl. SIPLUS variants)","vendor":"Siemens","versions":[{"lessThan":"V1.3","status":"affected","version":"0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC ET 200SP IM 155-6 PN R1","vendor":"Siemens","versions":[{"lessThan":"V6.0.1","status":"affected","version":"0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC ET 200SP IM 155-6 PN/2 HF","vendor":"Siemens","versions":[{"lessThan":"V4.2.5","status":"affected","version":"V4.2.0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC ET 200SP IM 155-6 PN/3 HF","vendor":"Siemens","versions":[{"lessThan":"V4.2.2","status":"affected","version":"0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC PN/MF Coupler","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIMATIC PN/PN Coupler","vendor":"Siemens","versions":[{"lessThan":"V6.0.0","status":"affected","version":"0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS ET 200MP IM 155-5 PN HF","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V4.2.0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS ET 200MP IM 155-5 PN HF","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V4.2.0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS ET 200MP IM 155-5 PN HF T1 RAIL","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"V4.2.0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS ET 200SP IM 155-6 PN HF","vendor":"Siemens","versions":[{"lessThan":"V4.2.5","status":"affected","version":"V4.2.0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS ET 200SP IM 155-6 PN HF","vendor":"Siemens","versions":[{"lessThan":"V4.2.5","status":"affected","version":"V4.2.0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS ET 200SP IM 155-6 PN HF T1 RAIL","vendor":"Siemens","versions":[{"lessThan":"V4.2.5","status":"affected","version":"V4.2.0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS ET 200SP IM 155-6 PN HF TX RAIL","vendor":"Siemens","versions":[{"lessThan":"V4.2.5","status":"affected","version":"V4.2.0","versionType":"custom"}]},{"defaultStatus":"unknown","product":"SIPLUS NET PN/PN Coupler","vendor":"Siemens","versions":[{"lessThan":"V6.0.0","status":"affected","version":"0","versionType":"custom"}]}],"descriptions":[{"lang":"en","value":"A vulnerability has been identified in SIMATIC ET 200AL IM 157-1 PN (6ES7157-1AB00-0AB0) (All versions), SIMATIC ET 200MP IM 155-5 PN HF (6ES7155-5AA00-0AC0) (All versions >= V4.2.0), SIMATIC ET 200SP IM 155-6 MF HF (6ES7155-6MU00-0CN0) (All versions), SIMATIC ET 200SP IM 155-6 PN HA (incl. SIPLUS variants) (All versions < V1.3), SIMATIC ET 200SP IM 155-6 PN R1 (6ES7155-6AU00-0HM0) (All versions < V6.0.1), SIMATIC ET 200SP IM 155-6 PN/2 HF (6ES7155-6AU01-0CN0) (All versions >= V4.2.0 < V4.2.5), SIMATIC ET 200SP IM 155-6 PN/3 HF (6ES7155-6AU30-0CN0) (All versions < V4.2.2), SIMATIC PN/MF Coupler (6ES7158-3MU10-0XA0) (All versions), SIMATIC PN/PN Coupler (6ES7158-3AD10-0XA0) (All versions < V6.0.0), SIPLUS ET 200MP IM 155-5 PN HF (6AG1155-5AA00-2AC0) (All versions >= V4.2.0), SIPLUS ET 200MP IM 155-5 PN HF (6AG1155-5AA00-7AC0) (All versions >= V4.2.0), SIPLUS ET 200MP IM 155-5 PN HF T1 RAIL (6AG2155-5AA00-1AC0) (All versions >= V4.2.0), SIPLUS ET 200SP IM 155-6 PN HF (6AG1155-6AU01-2CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS ET 200SP IM 155-6 PN HF (6AG1155-6AU01-7CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS ET 200SP IM 155-6 PN HF T1 RAIL (6AG2155-6AU01-1CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS ET 200SP IM 155-6 PN HF TX RAIL (6AG2155-6AU01-4CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS NET PN/PN Coupler (6AG2158-3AD10-4XA0) (All versions < V6.0.0). Affected devices do not properly handle S7 protocol session disconnect requests. When receiving a valid S7 protocol Disconnect Request (COTP DR TPDU) on TCP port 102, the devices enter an improper session state.\r\n\r\nThis could allow an attacker to cause the device to become unresponsive, leading to a denial-of-service condition that requires a power cycle to restore normal operation."}],"metrics":[{"cvssV3_1":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}},{"cvssV4_0":{"baseScore":8.7,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-06-09T08:46:51.475Z","orgId":"cec7a2ec-15b4-4faf-bd53-b40f371f3a77","shortName":"siemens"},"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-674753.html"}]}},"cveMetadata":{"assignerOrgId":"cec7a2ec-15b4-4faf-bd53-b40f371f3a77","assignerShortName":"siemens","cveId":"CVE-2025-40944","datePublished":"2026-01-13T09:44:05.792Z","dateReserved":"2025-04-16T09:06:15.879Z","dateUpdated":"2026-06-09T08:46:51.475Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-01-13 10:15:58","lastModifiedDate":"2026-06-09 10:16:37","problem_types":["CWE-400","CWE-400 CWE-400: Uncontrolled Resource Consumption"],"metrics":{"cvssMetricV40":[{"source":"productcert@siemens.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":8.7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"productcert@siemens.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2025","CveId":"40944","Ordinal":"1","Title":"CVE-2025-40944","CVE":"CVE-2025-40944","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"40944","Ordinal":"1","NoteData":"A vulnerability has been identified in SIMATIC ET 200AL IM 157-1 PN (6ES7157-1AB00-0AB0) (All versions), SIMATIC ET 200MP IM 155-5 PN HF (6ES7155-5AA00-0AC0) (All versions >= V4.2.0), SIMATIC ET 200SP IM 155-6 MF HF (6ES7155-6MU00-0CN0) (All versions), SIMATIC ET 200SP IM 155-6 PN HA (incl. SIPLUS variants) (All versions < V1.3), SIMATIC ET 200SP IM 155-6 PN R1 (6ES7155-6AU00-0HM0) (All versions < V6.0.1), SIMATIC ET 200SP IM 155-6 PN/2 HF (6ES7155-6AU01-0CN0) (All versions >= V4.2.0 < V4.2.5), SIMATIC ET 200SP IM 155-6 PN/3 HF (6ES7155-6AU30-0CN0) (All versions < V4.2.2), SIMATIC PN/MF Coupler (6ES7158-3MU10-0XA0) (All versions), SIMATIC PN/PN Coupler (6ES7158-3AD10-0XA0) (All versions < V6.0.0), SIPLUS ET 200MP IM 155-5 PN HF (6AG1155-5AA00-2AC0) (All versions >= V4.2.0), SIPLUS ET 200MP IM 155-5 PN HF (6AG1155-5AA00-7AC0) (All versions >= V4.2.0), SIPLUS ET 200MP IM 155-5 PN HF T1 RAIL (6AG2155-5AA00-1AC0) (All versions >= V4.2.0), SIPLUS ET 200SP IM 155-6 PN HF (6AG1155-6AU01-2CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS ET 200SP IM 155-6 PN HF (6AG1155-6AU01-7CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS ET 200SP IM 155-6 PN HF T1 RAIL (6AG2155-6AU01-1CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS ET 200SP IM 155-6 PN HF TX RAIL (6AG2155-6AU01-4CN0) (All versions >= V4.2.0 < V4.2.5), SIPLUS NET PN/PN Coupler (6AG2158-3AD10-4XA0) (All versions < V6.0.0). Affected devices do not properly handle S7 protocol session disconnect requests. When receiving a valid S7 protocol Disconnect Request (COTP DR TPDU) on TCP port 102, the devices enter an improper session state.\r\n\r\nThis could allow an attacker to cause the device to become unresponsive, leading to a denial-of-service condition that requires a power cycle to restore normal operation.","Type":"Description","Title":"CVE-2025-40944"}]}}}