{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-66720 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-66720 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-66720 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-2026-66720 and fix it if it is affected.\n\nWhat it is: CVE-2026-66720 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-2026-66720 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-2026-66720/ (Markdown: https://insights.sbomify.com/CVE-2026-66720/index.md)","id":"CVE-2026-66720","markdown":"https://insights.sbomify.com/CVE-2026-66720/index.md","name":"CVE-2026-66720","record":{"aliases":["GHSA-r4hv-9qm7-gp9j"],"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":"A remote attacker can crash the application by sending a malformed GOOSE frame with an undersized timestamp, causing a denial of service.","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 subscriber component improperly validates the UTC timestamp \nfield in unauthenticated IEC 61850 GOOSE (EtherType 0x88B8) Layer-2 \nmulticast messages. A specially crafted GOOSE frame containing an \nundersized timestamp field can trigger a heap out-of-bounds read during \nmessage processing, causing the process to crash and resulting in a \ndenial-of-service condition.","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-2026-66720","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":"Apache CloudStack: Authorization issue with listHostTags for domain admins","id":"CVE-2026-66721"},"packages":[],"prev":{"headline":"Apache Axis2/Java: deserialization of untrusted Data","id":"CVE-2026-66713"},"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":"A remote attacker can crash the application by sending a malformed GOOSE frame with an undersized timestamp, causing a denial of service.","url":"https://insights.sbomify.com/CVE-2026-66720/"}