{"id":"CVE-2018-4850","state":"PUBLISHED","title":"A vulnerability has been identified in SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below (All versions), SIMATIC S7-400 (incl. F) CPU hardware version 5.0 (All firmware v","description":"A vulnerability has been identified in SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below (All versions), SIMATIC S7-400 (incl. F) CPU hardware version 5.0 (All firmware versions < V5.2), SIMATIC S7-400H CPU hardware version 4.5 and below (All versions). The affected CPUs improperly validate S7 communication packets which could cause a Denial-of-Service condition of the CPU. The CPU will remain in DEFECT mode until manual restart.","publishedAt":"2018-05-16T17:00:00.000Z","updatedAt":"2024-09-16T22:46:02.128Z","severity":null,"assigner":"siemens","products":["Siemens AG SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below, SIMATIC S7-400 (incl. F) CPU hardware version 5.0, SIMATIC S7-400H CPU hardware version 4.5 and below"],"affected":[{"vendor":"Siemens AG","product":"SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below, SIMATIC S7-400 (incl. F) CPU hardware version 5.0, SIMATIC S7-400H CPU hardware version 4.5 and below","versions":[{"version":"SIMATIC S7-400 (incl. F) CPU hardware version 4.0 and below : All versions","status":"affected"},{"version":"SIMATIC S7-400 (incl. F) CPU hardware version 5.0 : All firmware versions < V5.2","status":"affected"},{"version":"SIMATIC S7-400H CPU hardware version 4.5 and below : All versions","status":"affected"}]}],"references":["https://cert-portal.siemens.com/productcert/pdf/ssa-914382.pdf","http://www.securityfocus.com/bid/104217","https://www.siemens.com/global/en/home/products/services/cert.html#SecurityPublications"],"weaknesses":["CWE-20"],"ingestedAt":"2026-10-29T19:44:51.755Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2018/4xxx/CVE-2018-4850.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2018-4850","state":"PUBLISHED","datePublished":"2018-05-16T17:00:00.000Z","dateUpdated":"2024-09-16T22:46:02.128Z","assignerShortName":"siemens","assignerOrgId":"cec7a2ec-15b4-4faf-bd53-b40f371f3a77","dateReserved":"2018-01-02T00:00:00.000Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"A vulnerability has been identified in SIMATIC S7-400 (incl. 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