{"id":"CVE-2025-40939","aliases":["EUVD-2025-201917","GHSA-35wm-hq5r-2p36"],"status":"published","title":"A vulnerability has been identified in SIMATIC CN 4100 (All versions \u003c V4.0.1). The affected...","description":"A vulnerability has been identified in SIMATIC CN 4100 (All versions \u003c V4.0.1). The affected device contains a USB port which allows unauthenticated connections. This could allow an attacker with physical access to the device to trigger reboot that could cause denial of service condition.","severity":{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00228,"percentile":0.13652,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-284"],"published":"2025-12-09T10:44:37Z","modified":"2026-10-23T22:10:00Z","products":[{"vendor":"siemens","product":"simatic cn 4100"},{"vendor":"siemens","product":"simatic_cn_4100_firmware"}],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-416652.html","tags":["Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-40939"},{"url":"https://github.com/advisories/GHSA-35wm-hq5r-2p36"}],"sources":{"cve":[{"id":"CVE-2025-40939","description":"A vulnerability has been identified in SIMATIC CN 4100 (All versions \u003c V4.0.1). The affected device contains a USB port which allows unauthenticated connections. This could allow an attacker with physical access to the device to trigger reboot that could cause denial of service condition.","status":"published","published":"2025-12-09T10:44:37.963Z","modified":"2025-12-09T15:26:06.742Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:32:34.773122Z"}],"euvd":[{"id":"EUVD-2025-201917","description":"A vulnerability has been identified in SIMATIC CN 4100 (All versions \u003c V4.0.1). The affected device contains a USB port which allows unauthenticated connections. This could allow an attacker with physical access to the device to trigger reboot that could cause denial of service condition.","status":"published","published":"2025-12-09T10:44:37Z","modified":"2025-12-09T15:26:06Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T19:49:08.049254Z"}],"ghsa":[{"id":"GHSA-35wm-hq5r-2p36","title":"A vulnerability has been identified in SIMATIC CN 4100 (All versions \u003c V4.0.1). The affected...","description":"A vulnerability has been identified in SIMATIC CN 4100 (All versions \u003c V4.0.1). The affected device contains a USB port which allows unauthenticated connections. This could allow an attacker with physical access to the device to trigger reboot that could cause denial of service condition.","status":"published","published":"2025-12-09T18:30:36Z","modified":"2025-12-09T18:30:43Z","cvss":[{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"},{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T15:05:06.487163Z"}],"nvd":[{"id":"CVE-2025-40939","description":"A vulnerability has been identified in SIMATIC CN 4100 (All versions \u003c V4.0.1). The affected device contains a USB port which allows unauthenticated connections. This could allow an attacker with physical access to the device to trigger reboot that could cause denial of service condition.","status":"published","published":"2025-12-09T16:17:47.617Z","modified":"2026-10-23T22:10:00.16Z","cvss":[{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.6,"vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:11:49.093461Z"}]}}