{"id":"CVE-2020-7538","aliases":["EUVD-2020-28663","GHSA-6xcf-xj69-qm4j"],"status":"published","title":"A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in PLC...","description":"A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) that could cause a crash of the PLC simulator present in EcoStruxureª Control Expert software when receiving a specially crafted request over Modbus.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01288,"percentile":0.70564,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-754"],"published":"2020-11-19T21:04:18Z","modified":"2026-06-17T03:24:58Z","products":[{"vendor":"schneider-electric","product":"ecostruxure_control_expert"}],"references":[{"url":"https://www.se.com/ww/en/download/document/SEVD-2020-315-07/","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-7538"},{"url":"https://github.com/advisories/GHSA-6xcf-xj69-qm4j"}],"sources":{"cve":[{"id":"CVE-2020-7538","description":"A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) that could cause a crash of the PLC simulator present in EcoStruxureª Control Expert software when receiving a specially crafted request over Modbus.","status":"published","published":"2020-11-19T21:04:18Z","modified":"2024-08-04T09:33:19.804Z","cwes":["CWE-754"],"updated_at":"2026-11-02T14:35:58.787905Z"}],"euvd":[{"id":"EUVD-2020-28663","description":"A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) that could cause a crash of the PLC simulator present in EcoStruxureª Control Expert software when receiving a specially crafted request over Modbus.","status":"published","published":"2020-11-19T21:04:18Z","modified":"2024-08-04T09:33:19Z","updated_at":"2026-11-03T03:07:59.603443Z"}],"ghsa":[{"id":"GHSA-6xcf-xj69-qm4j","title":"A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in PLC...","description":"A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) that could cause a crash of the PLC simulator present in EcoStruxureª Control Expert software when receiving a specially crafted request over Modbus.","status":"published","published":"2022-05-24T22:28:20Z","modified":"2023-01-30T05:04:59Z","cwes":["CWE-754"],"updated_at":"2026-11-02T14:47:10.51539Z"}],"nvd":[{"id":"CVE-2020-7538","description":"A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) that could cause a crash of the PLC simulator present in EcoStruxureª Control Expert software when receiving a specially crafted request over Modbus.","status":"published","published":"2020-11-19T22:15:14.02Z","modified":"2026-06-17T03:24:58.05Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-754"],"updated_at":"2026-11-02T14:06:25.394006Z"}]}}