{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-3869 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-3869 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-3869 is a critical authentication bypass vulnerability in Schneider Electric Modicon M580, published on 11 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-3869 and fix it if it is affected.\n\nWhat it is: CVE-2026-3869 is a critical authentication bypass vulnerability in Schneider Electric Modicon M580, published on 11 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-3869 in the wild and no public exploit code.\n\nAffected product: Schneider Electric Modicon M580. 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-2026-3869/ (Markdown: https://insights.sbomify.com/CVE-2026-3869/index.md)","id":"CVE-2026-3869","markdown":"https://insights.sbomify.com/CVE-2026-3869/index.md","name":"CVE-2026-3869","record":{"aliases":["GHSA-g6jw-g6wr-2qcc"],"analysis":{"component_type":"ics_ot","fix_type":"patch","impacts":["data_read","data_modify","denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"Modicon PLC","requires_auth":"none","summary":"Incorrect authentication implementation allows attackers to compromise confidentiality, integrity, and availability of Modicon PLCs when running lower-level applications.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"schneider","cpe":[],"cvss":{"score":9.2,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-303","name":"Incorrect Implementation of Authentication Algorithm"}],"description":"CWE-303 : Incorrect Implementation of Authentication Algorithm vulnerability exists that could cause loss of confidentiality, integrity and availability of the PLC provided an application project with a lower application level is running on the PLC.","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 Modicon M580","id":"CVE-2026-3869","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Memory corruption in VMG4005-B50B firmware","id":"CVE-2026-3870"},"packages":[],"prev":{"headline":"Denial of service in EDR-8010 Series","id":"CVE-2026-3868"},"products":["Modicon M580","Modicon M580 Safety"],"published":"2026-09-11","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"total"},"state":"PUBLISHED","updated":"2026-09-11","vendors":["Schneider Electric"]},"summary":"Incorrect authentication implementation allows attackers to compromise confidentiality, integrity, and availability of Modicon PLCs when running lower-level applications.","url":"https://insights.sbomify.com/CVE-2026-3869/"}