{"cve":"CVE-2018-4838","nvd":{"published":"2018-03-08T17:29:00.210","modified":"2026-06-17T01:59:08.600","status":"Modified","description":"A vulnerability has been identified in EN100 Ethernet module IEC 61850 variant (All versions < V4.30), EN100 Ethernet module DNP3 variant (All versions < V1.04), EN100 Ethernet module PROFINET IO variant (All versions), EN100 Ethernet module Modbus TCP variant (All versions), EN100 Ethernet module IEC 104 variant (All versions < V1.22). The web interface (TCP/80) of affected devices allows an unauthenticated user to upgrade or downgrade the firmware of the device, including to older versions with known vulnerabilities.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-306"],"references":["https://cert-portal.siemens.com/productcert/pdf/ssa-845879.pdf","https://www.securityfocus.com/bid/103379","https://ics-cert.us-cert.gov/advisories/ICSA-18-067-01","https://cert-portal.siemens.com/productcert/pdf/ssa-845879.pdf","https://www.securityfocus.com/bid/103379"],"products":["siemens:en100_ethernet_module_dnp3_firmware","siemens:en100_ethernet_module_iec_104_firmware","siemens:en100_ethernet_module_iec_61850_firmware","siemens:en100_ethernet_module_modbus_tcp_firmware","siemens:en100_ethernet_module_profinet_io_firmware"],"source":"nvd","synced_at":"2026-10-19T20:48:50.842038930+00:00"},"epss":{"cve":"CVE-2018-4838","score":0.01404,"percentile":0.72568,"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."]}