{"id":"CVE-2025-40940","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-40940","generatedAt":"2026-10-28T02:56:17.607Z","title":"A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1).","description":"A vulnerability has been identified in SIMATIC CN 4100 (All versions < 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.","published":"2025-12-09T16:17:48.000Z","lastModified":"2026-10-23T22:10:00.000Z","status":"Analyzed","sourceIdentifier":"productcert@siemens.com","cvss":{"version":"4.0","score":6.9,"severity":"MEDIUM","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/M"},"cwe":["CWE-200"],"affected":["siemens/simatic cn 4100 firmware"],"epss":{"score":0.00366,"percentile":0.30231,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.37%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-416652.html","tags":["Vendor Advisory"],"source":"productcert@siemens.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-40940","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}