{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2020-6986 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-6986 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-6986 is a high-severity denial of service vulnerability in Omron PLC CJ Series, published on 5 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-6986 and fix it if it is affected.\n\nWhat it is: CVE-2020-6986 is a high-severity denial of service vulnerability in Omron PLC CJ Series, published on 5 Mar 2020. 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-2020-6986 in the wild and no public exploit code.\n\nAffected product: Omron PLC CJ Series. 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-2020-6986/ (Markdown: https://insights.sbomify.com/CVE-2020-6986/index.md)","id":"CVE-2020-6986","markdown":"https://insights.sbomify.com/CVE-2020-6986/index.md","name":"CVE-2020-6986","record":{"aliases":["GHSA-jpcw-9g3f-frpr"],"analysis":{"component_type":"ics_ot","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Omron PLC CJ Series","requires_auth":"none","summary":"An attacker can cause a denial of service on Omron PLC CJ Series Ethernet modules by sending specific data packets.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"icscert","cpe":[{"product":"plc_cj1_firmware","vendor":"omron"},{"product":"plc_cj2_firmware","vendor":"omron"}],"cvss":{"score":7.5,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"In all versions of Omron PLC CJ Series, an attacker can send a series of specific data packets within a short period, causing a service error on the PLC Ethernet module, which in turn causes a PLC service denied result.","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":"Denial of service in Omron PLC CJ Series","id":"CVE-2020-6986","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2020"},"n_packages":0,"n_references":1,"next":{"headline":"Weak cryptography in Moxa PT-7528 series firmware, Version 4.0 or lower, PT-7828 series firmware, Version 3.9 or lower","id":"CVE-2020-6987"},"packages":[],"prev":{"headline":"Hardcoded credentials in Moxa PT-7528 series firmware, Version 4.0 or lower, PT-7828 series firmware, Version 3.9 or lower","id":"CVE-2020-6985"},"products":["Omron PLC CJ Series"],"published":"2020-03-05","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"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":"2026-06-02","vendors":["n/a"]},"summary":"An attacker can cause a denial of service on Omron PLC CJ Series Ethernet modules by sending specific data packets.","url":"https://insights.sbomify.com/CVE-2020-6986/"}