{"answers":{"affected":"It affects 7 products.","exploited":"There is no known exploitation of CVE-2023-25556 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2023-25556 yet. Limit exposure of the affected software until one is available.","what":"CVE-2023-25556 is a high-severity authentication bypass vulnerability in Schneider Electric Merten INSTABUS Tastermodul 1fach System M 625199, published on 18 Apr 2023. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-25556 and fix it if it is affected.\n\nWhat it is: CVE-2023-25556 is a high-severity authentication bypass vulnerability in Schneider Electric Merten INSTABUS Tastermodul 1fach System M 625199, published on 18 Apr 2023. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2023-25556 in the wild and no public exploit code.\n\nAffected product: Schneider Electric Merten INSTABUS Tastermodul 1fach System M 625199. 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-2023-25556/ (Markdown: https://insights.sbomify.com/CVE-2023-25556/index.md)","id":"CVE-2023-25556","markdown":"https://insights.sbomify.com/CVE-2023-25556/index.md","name":"CVE-2023-25556","record":{"aliases":["GHSA-q53x-4f23-hq3j"],"analysis":{"component_type":"iot_embedded","fix_type":"patch","impacts":["privilege_escalation","other"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"KNX building automation","requires_auth":"none","summary":"Attackers with local access can compromise KNX devices by exploiting weak authentication that accepts keys shorter than seven digits.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"schneider","cpe":[{"product":"merten_instabus_tastermodul_1fach_system_m_firmware","vendor":"schneider-electric"},{"product":"merten_instabus_tastermodul_2fach_system_m_firmware","vendor":"schneider-electric"},{"product":"merten_jalousie-\\/schaltaktor_reg-k\\/8x\\/16x\\/10_m._hb_firmware","vendor":"schneider-electric"},{"product":"merten_knx_argus_180\\/2\\,20m_up_system_firmware","vendor":"schneider-electric"},{"product":"merten_knx_schaltakt.2x6a_up_m.2_eing._firmware","vendor":"schneider-electric"},{"product":"merten_knx_uni-dimmaktor_ll_reg-k\\/2x230\\/300_w_firmware","vendor":"schneider-electric"},{"product":"merten_tasterschnittstelle_4fach_plus_firmware","vendor":"schneider-electric"}],"cvss":{"score":8.3,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"description":"A CWE-287: Improper Authentication vulnerability exists that could allow a device to be\ncompromised when a key of less than seven digits is entered and the attacker has access to the\nKNX installation.","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":"Auth bypass in Merten INSTABUS Tastermodul 1fach System M 625199","id":"CVE-2023-25556","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2023"},"n_packages":0,"n_references":1,"next":{"headline":"Server-Side Request Forgery in DataHub","id":"CVE-2023-25557"},"packages":[],"prev":{"headline":"Command injection in StruxureWare Data Center Expert","id":"CVE-2023-25555"},"products":["Merten INSTABUS Tastermodul 1fach System M 625199","Merten INSTABUS Tastermodul 2fach System M 625299","Merten Jalousie-/Schaltaktor REG-K/8x/16x/10 m. HB 649908","Merten KNX ARGUS 180/2,20M UP SYSTEM 631725","Merten KNX Schaltakt.2x6A UP m.2 Eing. MEG6003-0002","Merten KNX Uni-Dimmaktor LL REG-K/2x230/300 W MEG6710-0002","Merten Tasterschnittstelle 4fach plus 670804"],"published":"2023-04-18","related":[],"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":"2025-02-05","vendors":["Schneider Electric"]},"summary":"Attackers with local access can compromise KNX devices by exploiting weak authentication that accepts keys shorter than seven digits.","url":"https://insights.sbomify.com/CVE-2023-25556/"}