{"id":"CVE-2025-40940","aliases":["EUVD-2025-201916","GHSA-2cx9-pwfc-xwx3"],"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 application exhibits inconsistent SNMP behavior, such as unexpected service availability and unreliable configuration handling across protocol versions. This could allow an attacker to access sensitive data, potentially leading to a breach of confidentiality.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00393,"percentile":0.33683,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200"],"published":"2025-12-09T10:44:39Z","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-2025-40940"},{"url":"https://github.com/advisories/GHSA-2cx9-pwfc-xwx3"}],"sources":{"cve":[{"id":"CVE-2025-40940","description":"A vulnerability has been identified in SIMATIC CN 4100 (All versions \u003c V4.0.1). The affected application exhibits inconsistent SNMP behavior, such as unexpected service availability and unreliable configuration handling across protocol versions. This could allow an attacker to access sensitive data, potentially leading to a breach of confidentiality.","status":"published","published":"2025-12-09T10:44:39.009Z","modified":"2025-12-09T15:18:54.927Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"},{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:32:34.773122Z"}],"euvd":[{"id":"EUVD-2025-201916","description":"A vulnerability has been identified in SIMATIC CN 4100 (All versions \u003c V4.0.1). The affected application exhibits inconsistent SNMP behavior, such as unexpected service availability and unreliable configuration handling across protocol versions. This could allow an attacker to access sensitive data, potentially leading to a breach of confidentiality.","status":"published","published":"2025-12-09T10:44:39Z","modified":"2025-12-09T15:18:54Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T19:49:08.049254Z"}],"ghsa":[{"id":"GHSA-2cx9-pwfc-xwx3","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 application exhibits inconsistent SNMP behavior, such as unexpected service availability and unreliable configuration handling across protocol versions. This could allow an attacker to access sensitive data, potentially leading to a breach of confidentiality.","status":"published","published":"2025-12-09T18:30:36Z","modified":"2025-12-09T18:30:43Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/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"},{"version":"3.1","score":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T15:05:06.487163Z"}],"nvd":[{"id":"CVE-2025-40940","description":"A vulnerability has been identified in SIMATIC CN 4100 (All versions \u003c V4.0.1). The affected application exhibits inconsistent SNMP behavior, such as unexpected service availability and unreliable configuration handling across protocol versions. This could allow an attacker to access sensitive data, potentially leading to a breach of confidentiality.","status":"published","published":"2025-12-09T16:17:47.813Z","modified":"2026-10-23T22:10:00.16Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/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":4.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-200"],"updated_at":"2026-11-02T14:11:49.093461Z"}]}}