{"cve":"CVE-2020-15783","nvd":{"published":"2020-11-12T20:15:16.343","modified":"2026-06-17T02:57:10.910","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400"],"references":["https://cert-portal.siemens.com/productcert/pdf/ssa-492828.pdf","https://cert-portal.siemens.com/productcert/pdf/ssa-492828.pdf"],"products":["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_315f-2_dp_firmware","siemens:simatic_s7-300_cpu_315f-2_pn_firmware","siemens:simatic_s7-300_cpu_317-2_dp_firmware","siemens:simatic_s7-300_cpu_317-2_pn_firmware","siemens:simatic_s7-300_cpu_317f-2_dp_firmware","siemens:simatic_s7-300_cpu_317f-2_pn_firmware","siemens:simatic_tdc_cpu555_firmware","siemens:sinumerik_840d_sl_firmware"],"source":"nvd","synced_at":"2026-10-19T21:11:20.317016139+00:00"},"epss":{"cve":"CVE-2020-15783","score":0.01652,"percentile":0.7654,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}