{"id":"CVE-2020-15791","aliases":["EUVD-2020-7774","GHSA-8qxp-fp5j-5wxj"],"status":"published","title":"A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and...","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.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.00712,"percentile":0.54084,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-522"],"published":"2020-09-09T18:13:11Z","modified":"2026-06-17T02:57:11Z","products":[{"vendor":"siemens","product":"simatic s7-300 cpu family (incl. related et200 cpus and siplus variants)"},{"vendor":"siemens","product":"simatic s7-400 cpu family (incl. siplus variants)"},{"vendor":"siemens","product":"simatic winac rtx (f) 2010"},{"vendor":"siemens","product":"simatic_s7-300_cpu_312_firmware"},{"vendor":"siemens","product":"simatic_s7-300_cpu_314_firmware"},{"vendor":"siemens","product":"simatic_s7-300_cpu_315-2_dp_firmware"},{"vendor":"siemens","product":"simatic_s7-300_cpu_315-2_pn_firmware"},{"vendor":"siemens","product":"simatic_s7-300_cpu_315f-2_dp_firmware"},{"vendor":"siemens","product":"simatic_s7-300_cpu_315f-2_pn_firmware"},{"vendor":"siemens","product":"simatic_s7-300_cpu_317-2_dp_firmware"},{"vendor":"siemens","product":"simatic_s7-300_cpu_317-2_pn_firmware"},{"vendor":"siemens","product":"simatic_s7-300_cpu_317f-2_dp_firmware"},{"vendor":"siemens","product":"simatic_s7-300_cpu_317f-2_pn_firmware"},{"vendor":"siemens","product":"simatic_s7-400_cpu_412_firmware"},{"vendor":"siemens","product":"simatic_s7-400_cpu_414_firmware"},{"vendor":"siemens","product":"simatic_s7-400_cpu_416_firmware"},{"vendor":"siemens","product":"simatic_s7-400_cpu_417_firmware"},{"vendor":"siemens","product":"sinumerik 840d sl"}],"references":[{"url":"https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-15791"},{"url":"https://github.com/advisories/GHSA-8qxp-fp5j-5wxj"}],"sources":{"cve":[{"id":"CVE-2020-15791","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.","status":"published","published":"2020-09-09T18:13:11Z","modified":"2026-06-02T18:45:29.902Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"adp"}],"cwes":["CWE-522"],"updated_at":"2026-11-02T14:35:49.879248Z"}],"euvd":[{"id":"EUVD-2020-7774","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.","status":"published","published":"2020-09-09T18:13:11Z","modified":"2026-06-02T18:45:29Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T18:20:55.651138Z"}],"ghsa":[{"id":"GHSA-8qxp-fp5j-5wxj","title":"A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and...","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). 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.","status":"published","published":"2022-05-24T17:27:38Z","modified":"2026-06-02T21:31:35Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-522"],"updated_at":"2026-11-02T15:08:30.158602Z"}],"nvd":[{"id":"CVE-2020-15791","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.","status":"published","published":"2020-09-09T19:15:20.663Z","modified":"2026-06-17T02:57:11.87Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"2.0","score":3.3,"vector":"AV:A/AC:L/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-522"],"updated_at":"2026-11-02T14:06:14.981587Z"}]}}