{"id":"CVE-2020-15783","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-15783","generatedAt":"2026-10-27T22:33:56.997Z","title":"A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC TDC CPU555 (All versions), SINUMERIK 840D sl (All versions).","description":"A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC TDC CPU555 (All versions), SINUMERIK 840D sl (All versions). Sending multiple specially crafted packets to the affected devices could cause a Denial-of-Service on port 102. A cold restart is required to recover the service.","published":"2020-11-12T20:15:16.000Z","lastModified":"2026-06-17T02:57:11.000Z","status":"Modified","sourceIdentifier":"productcert@siemens.com","cvss":{"version":"3.1","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"},"cwe":["CWE-400"],"affected":["siemens/sinumerik 840d sl firmware","siemens/simatic s7-300 cpu 312 firmware","siemens/simatic s7-300 cpu 314 firmware","siemens/simatic s7-300 cpu 315-2 dp firmware","siemens/simatic s7-300 cpu 315-2 pn firmware","siemens/simatic s7-300 cpu 317-2 pn firmware","siemens/simatic s7-300 cpu 317-2 dp firmware","siemens/simatic s7-300 cpu 315f-2 dp firmware","siemens/simatic s7-300 cpu 315f-2 pn firmware","siemens/simatic s7-300 cpu 317f-2 pn firmware","siemens/simatic s7-300 cpu 317f-2 dp firmware","siemens/simatic tdc cpu555 firmware"],"epss":{"score":0.01666,"percentile":0.76583,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.67%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-492828.pdf","tags":["Mitigation","Vendor Advisory"],"source":"productcert@siemens.com"},{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-492828.pdf","tags":["Mitigation","Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-15783","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}