{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-66364 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-66364 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-66364 is a high-severity denial of service vulnerability in MZ Automation GmbH libiec61850, published on 30 Jul 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-2026-66364 and fix it if it is affected.\n\nWhat it is: CVE-2026-66364 is a high-severity denial of service vulnerability in MZ Automation GmbH libiec61850, published on 30 Jul 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-2026-66364 in the wild and no public exploit code.\n\nAffected product: MZ Automation GmbH libiec61850. 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-2026-66364/ (Markdown: https://insights.sbomify.com/CVE-2026-66364/index.md)","id":"CVE-2026-66364","markdown":"https://insights.sbomify.com/CVE-2026-66364/index.md","name":"CVE-2026-66364","record":{"aliases":["GHSA-hw99-2wcp-34xq"],"analysis":{"component_type":"library","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"IEC 61850 library","requires_auth":"none","summary":"An attacker can cause a denial of service in libiec61850 subscribers by sending a crafted multicast frame that triggers an out-of-bounds read.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"icscert","cpe":[],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"The GOOSE payload parser contains a boundary handling flaw that can be \ntriggered by a single unauthenticated Layer 2 multicast frame on the \nprocess bus. When processing specific payload fields, an attacker \ncontrolled inner element length may exceed its enclosing length, causing\n the parser to over read by one byte. This out-of-bounds read reliably \nterminates the subscriber process, resulting in a denial-of-service \ncondition.","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":"MZ Automation libiec61850 Out-of-bounds Read","id":"CVE-2026-66364","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"MZ Automation libiec61850 Out-of-bounds Read","id":"CVE-2026-66369"},"packages":[],"prev":{"headline":"NGF vulnerability","id":"CVE-2026-66362"},"products":["libiec61850"],"published":"2026-07-30","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":"2026-07-31","vendors":["MZ Automation GmbH"]},"summary":"An attacker can cause a denial of service in libiec61850 subscribers by sending a crafted multicast frame that triggers an out-of-bounds read.","url":"https://insights.sbomify.com/CVE-2026-66364/"}