{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-8479 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-8479 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-8479 is a medium-severity vulnerability in Hitachi Energy RTU500 series CMU firmware, published on 26 May 2026. 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-2026-8479 and fix it if it is affected.\n\nWhat it is: CVE-2026-8479 is a medium-severity vulnerability in Hitachi Energy RTU500 series CMU firmware, published on 26 May 2026. 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-2026-8479 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-2026-8479/ (Markdown: https://insights.sbomify.com/CVE-2026-8479/index.md)","id":"CVE-2026-8479","markdown":"https://insights.sbomify.com/CVE-2026-8479/index.md","name":"CVE-2026-8479","record":{"aliases":["GHSA-m2rr-g8pf-8wrj"],"analysis":{"component_type":"ics_ot","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"RTU500 series firmware","requires_auth":"low_privilege","summary":"A specially crafted message sequence causes a null pointer dereference in RTU500 firmware, leading to denial of service when bidirectional IEC 60870-5-104 is enabled.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Hitachi Energy","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"IEC 60870-5-104 used in bidirectional mode in RTU500 is vulnerable\nfor a NULL pointer dereferencing, if a specially crafted\nsequence of messages is sent for a certain time, causing\nDenial of Service impact.\nProduct is only affected if IEC 60870-5-104 functionality in\nbidirectional mode (BCI) is configured.","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":"Null dereference in RTU500 series CMU firmware","id":"CVE-2026-8479","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Connection possible to the Administration portal with a revoked certificate","id":"CVE-2026-8480"},"packages":[],"prev":{"headline":"Langflow OSS is affected by arbitrary code execution in component generation, validation, and custom component handling","id":"CVE-2026-8478"},"products":["RTU500 series CMU firmware"],"published":"2026-05-26","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":"partial"},"state":"PUBLISHED","updated":"2026-05-26","vendors":["Hitachi Energy"]},"summary":"A specially crafted message sequence causes a null pointer dereference in RTU500 firmware, leading to denial of service when bidirectional IEC 60870-5-104 is enabled.","url":"https://insights.sbomify.com/CVE-2026-8479/"}