{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-8066 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-8066 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-8066 is a critical path traversal vulnerability in Hitachi Energy RTU500 series CMU firmware, published on 29 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-2026-8066 and fix it if it is affected.\n\nWhat it is: CVE-2026-8066 is a critical path traversal vulnerability in Hitachi Energy RTU500 series CMU firmware, published on 29 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-2026-8066 in the wild and no public exploit code.\n\nAffected product: Hitachi Energy RTU500 series CMU firmware. 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-2026-8066/ (Markdown: https://insights.sbomify.com/CVE-2026-8066/index.md)","id":"CVE-2026-8066","markdown":"https://insights.sbomify.com/CVE-2026-8066/index.md","name":"CVE-2026-8066","record":{"aliases":["GHSA-27cq-c5r3-854p"],"analysis":{"component_type":"ics_ot","fix_type":"end_of_life","impacts":["data_modify","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Hitachi RTU500 firmware","requires_auth":"none","summary":"Unauthenticated attackers can exploit a directory traversal flaw in Hitachi RTU500 firmware to write arbitrary files, potentially modifying data or disrupting operations.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Hitachi Energy","cpe":[],"cvss":{"score":9.1,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-23","name":"Relative Path Traversal"}],"description":"A directory traversal vulnerability in the file upload functionality of Hitachi Energy RTU500 end-of-life versions allows an unauthenticated attacker to write or overwrite arbitrary files on the device file system. Depending on the files affected, successful exploitation could result in unauthorized modification of device data or disruption of the device’s intended operation.","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":"Path traversal in RTU500 series CMU firmware","id":"CVE-2026-8066","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Missing authorization in RTU500 series CMU firmware","id":"CVE-2026-8067"},"packages":[],"prev":{"headline":"Auth bypass in RTU500 series CMU firmware","id":"CVE-2026-8065"},"products":["RTU500 series CMU firmware"],"published":"2026-09-29","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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-29","vendors":["Hitachi Energy"]},"summary":"Unauthenticated attackers can exploit a directory traversal flaw in Hitachi RTU500 firmware to write arbitrary files, potentially modifying data or disrupting operations.","url":"https://insights.sbomify.com/CVE-2026-8066/"}