{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-40940 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2025-40940 yet. Limit exposure of the affected software until one is available.","what":"CVE-2025-40940 is a medium-severity vulnerability in Siemens SIMATIC CN 4100, published on 9 Dec 2025. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-40940 and fix it if it is affected.\n\nWhat it is: CVE-2025-40940 is a medium-severity vulnerability in Siemens SIMATIC CN 4100, published on 9 Dec 2025. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-40940 in the wild and no public exploit code.\n\nAffected product: Siemens SIMATIC CN 4100. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-40940/ (Markdown: https://insights.sbomify.com/CVE-2025-40940/index.md)","id":"CVE-2025-40940","markdown":"https://insights.sbomify.com/CVE-2025-40940/index.md","name":"CVE-2025-40940","record":{"aliases":["GHSA-2cx9-pwfc-xwx3"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Industrial network device","requires_auth":"high_privilege","summary":"An attacker can access sensitive data due to inconsistent SNMP behavior in SIMATIC CN 4100 devices, compromising confidentiality.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"siemens","cpe":[{"product":"simatic_cn_4100_firmware","vendor":"siemens"}],"cvss":{"score":6.9,"severity":"medium","source":"cna","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","version":"4.0"},"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Information disclosure in SIMATIC CN 4100","id":"CVE-2025-40940","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2025"},"n_packages":0,"n_references":1,"next":{"headline":"Information disclosure in SIMATIC CN 4100","id":"CVE-2025-40941"},"packages":[],"prev":{"headline":"Denial of service in SIMATIC CN 4100","id":"CVE-2025-40939"},"products":["SIMATIC CN 4100"],"published":"2025-12-09","related":[{"cvss_score":10,"headline":"Hardcoded credentials in SIMATIC CN 4100","id":"CVE-2024-32741","kev_date_added":null,"published":"2024-05-14"},{"cvss_score":9.9,"headline":"Privilege escalation in SIMATIC CN 4100","id":"CVE-2023-29130","kev_date_added":null,"published":"2023-07-11"},{"cvss_score":9.8,"headline":"Hardcoded credentials in SIMATIC CN 4100","id":"CVE-2024-32740","kev_date_added":null,"published":"2024-05-14"},{"cvss_score":9.8,"headline":"Hardcoded credentials in SIMATIC CN 4100","id":"CVE-2023-49621","kev_date_added":null,"published":"2024-01-09"},{"cvss_score":9.2,"headline":"Hardcoded credentials in SIMATIC CN 4100","id":"CVE-2025-40938","kev_date_added":null,"published":"2025-12-09"},{"cvss_score":8.8,"headline":"Missing authorization in SIMATIC CN 4100","id":"CVE-2026-22924","kev_date_added":null,"published":"2026-05-12"},{"cvss_score":8.8,"headline":"Auth bypass in SIMATIC CN 4100","id":"CVE-2023-49251","kev_date_added":null,"published":"2024-01-09"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-12-09","vendors":["Siemens"]},"summary":"An attacker can access sensitive data due to inconsistent SNMP behavior in SIMATIC CN 4100 devices, compromising confidentiality.","url":"https://insights.sbomify.com/CVE-2025-40940/"}