{"cve":"CVE-2020-15791","nvd":{"published":"2020-09-09T19:15:20.663","modified":"2026-06-17T02:57:11.870","status":"Modified","description":"A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 CPU family (incl. SIPLUS variants) (All versions), SIMATIC WinAC RTX (F) 2010 (All versions), SINUMERIK 840D sl (All versions). The authentication protocol between a client and a PLC via port 102/tcp (ISO-TSAP) insufficiently protects the transmitted password. This could allow an attacker that is able to intercept the network traffic to obtain valid PLC credentials.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":6.5},"cwes":["CWE-522"],"references":["https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf","https://cert-portal.siemens.com/productcert/pdf/ssa-381684.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_s7-400_cpu_412_firmware","siemens:simatic_s7-400_cpu_414_firmware","siemens:simatic_s7-400_cpu_416_firmware","siemens:simatic_s7-400_cpu_417_firmware"],"source":"nvd","synced_at":"2026-10-19T21:09:20.498348299+00:00"},"epss":{"cve":"CVE-2020-15791","score":0.00712,"percentile":0.53617,"date":"2026-11-01"},"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."]}