{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40743 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2025-40743 yet. Limit exposure of the affected software until one is available.","what":"CVE-2025-40743 is a high-severity authentication bypass vulnerability in Siemens SINUMERIK 828D PPU.4, published on 12 Aug 2025. 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-2025-40743 and fix it if it is affected.\n\nWhat it is: CVE-2025-40743 is a high-severity authentication bypass vulnerability in Siemens SINUMERIK 828D PPU.4, published on 12 Aug 2025. 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-2025-40743 in the wild and no public exploit code.\n\nAffected product: Siemens SINUMERIK 828D PPU.4. 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-2025-40743/ (Markdown: https://insights.sbomify.com/CVE-2025-40743/index.md)","id":"CVE-2025-40743","markdown":"https://insights.sbomify.com/CVE-2025-40743/index.md","name":"CVE-2025-40743","record":{"aliases":["GHSA-mr3f-gmg7-3h9c"],"analysis":{"component_type":"ics_ot","fix_type":"upgrade","impacts":["account_takeover","data_read","data_modify","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"SINUMERIK CNC controller","requires_auth":"none","summary":"Attackers can bypass VNC authentication to gain unauthorized remote access to SINUMERIK CNC controllers, compromising system confidentiality, integrity, and availability.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"siemens","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-288","name":"Authentication Bypass Using an Alternate Path or Channel"}],"description":"A vulnerability has been identified in SINUMERIK 828D PPU.4 (All versions \u003c V4.95 SP5), SINUMERIK 828D PPU.5 (All versions \u003c V5.25 SP1), SINUMERIK 840D sl (All versions \u003c V4.95 SP5), SINUMERIK MC (All versions \u003c V1.25 SP1), SINUMERIK MC V1.15 (All versions \u003c V1.15 SP5), SINUMERIK ONE (All versions \u003c V6.25 SP1), SINUMERIK ONE V6.15 (All versions \u003c V6.15 SP5). The affected application improperly validates authentication for its VNC access service, allowing access with insufficient password verification.\r\nThis could allow an attacker to gain unauthorized remote access and potentially compromise system confidentiality, integrity, or availability.","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 SINUMERIK 828D PPU.4","id":"CVE-2025-40743","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2025"},"n_packages":0,"n_references":1,"next":{"headline":"Security feature bypass in Solid Edge SE2025","id":"CVE-2025-40744"},"packages":[],"prev":{"headline":"Information disclosure in SIPROTEC 5 6MD84 (CP300)","id":"CVE-2025-40742"},"products":["SINUMERIK 828D PPU.4","SINUMERIK 828D PPU.5","SINUMERIK 840D sl","SINUMERIK MC","SINUMERIK MC V1.15","SINUMERIK ONE","SINUMERIK ONE V6.15"],"published":"2025-08-12","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":"2025-08-13","vendors":["Siemens"]},"summary":"Attackers can bypass VNC authentication to gain unauthorized remote access to SINUMERIK CNC controllers, compromising system confidentiality, integrity, and availability.","url":"https://insights.sbomify.com/CVE-2025-40743/"}