{"id":"CVE-2025-40938","title":"A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1)","summary":"A vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected device stores sensitive information in the firmware. This could allow an attacker to access and misuse this information, potentially impacting t…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-798"],"vendor":"siemens","product":"simatic_cn_4100_firmware","affected":["simatic_cn_4100_firmware < 4.0.1"],"patched":["simatic_cn_4100_firmware 4.0.1"],"published":"2025-12-09","updated":"2026-10-07","sourceUpdated":"2026-10-07T20:10:01.970","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-40938","references":[{"url":"https://cert-portal.siemens.com/productcert/html/ssa-416652.html","label":"productcert@siemens.com"}],"tags":["nvd"],"epss":0.00377,"epssPercentile":0.2943,"ingestedAt":"2026-10-07T20:46:46.791Z","slug":"CVE-2025-40938","body":"## Overview\n\nA vulnerability has been identified in SIMATIC CN 4100 (All versions < V4.0.1). The affected device stores sensitive information in the firmware. This could allow an attacker to access and misuse this information, potentially impacting the device’s confidentiality, integrity, and availability.\n\n## Affected\n\n- `simatic_cn_4100_firmware < 4.0.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `simatic_cn_4100_firmware 4.0.1`","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}