{"answers":{"affected":"It affects 33 products.","exploited":"There is no known exploitation of CVE-2021-20586 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-20586 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-20586 is a high-severity denial of service vulnerability in Robot Controller MELFA FR Series; Robot Controller CR Series; Cooperative Robot ASSISTA, published on 29 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-20586 and fix it if it is affected.\n\nWhat it is: CVE-2021-20586 is a high-severity denial of service vulnerability in Robot Controller MELFA FR Series; Robot Controller CR Series; Cooperative Robot ASSISTA, published on 29 Jan 2021. 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-2021-20586 in the wild and no public exploit code.\n\nAffected product: Robot Controller MELFA FR Series; Robot Controller CR Series; Cooperative Robot ASSISTA. 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-2021-20586/ (Markdown: https://insights.sbomify.com/CVE-2021-20586/index.md)","id":"CVE-2021-20586","markdown":"https://insights.sbomify.com/CVE-2021-20586/index.md","name":"CVE-2021-20586","record":{"aliases":["GHSA-c9mw-29g5-hf3h"],"analysis":{"component_type":"ics_ot","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Industrial robot controller","requires_auth":"none","summary":"Remote unauthenticated attackers can cause denial of service in Mitsubishi MELFA and ASSISTA robot controllers by flooding them with burst packets.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Mitsubishi","cpe":[{"product":"rh12frh55_firmware","vendor":"mitsubishielectric"},{"product":"rh12frh85_firmware","vendor":"mitsubishielectric"},{"product":"rh12rfh70_firmware","vendor":"mitsubishielectric"},{"product":"rh1frhr_firmware","vendor":"mitsubishielectric"},{"product":"rh20frh100_firmware","vendor":"mitsubishielectric"},{"product":"rh20frh85_firmware","vendor":"mitsubishielectric"},{"product":"rh3frh35_firmware","vendor":"mitsubishielectric"},{"product":"rh3frh45_firmware","vendor":"mitsubishielectric"},{"product":"rh3frh55_firmware","vendor":"mitsubishielectric"},{"product":"rh3frhr_firmware","vendor":"mitsubishielectric"},{"product":"rh6frh35_firmware","vendor":"mitsubishielectric"},{"product":"rh6frh45_firmware","vendor":"mitsubishielectric"},{"product":"rh6frh55_firmware","vendor":"mitsubishielectric"},{"product":"rv13fr_firmware","vendor":"mitsubishielectric"},{"product":"rv13frl_firmware","vendor":"mitsubishielectric"},{"product":"rv13frlm\\/c_firmware","vendor":"mitsubishielectric"},{"product":"rv13frm\\/c_firmware","vendor":"mitsubishielectric"},{"product":"rv20fr_firmware","vendor":"mitsubishielectric"},{"product":"rv20frm\\/c_firmware","vendor":"mitsubishielectric"},{"product":"rv2fr\\(b\\)_firmware","vendor":"mitsubishielectric"},{"product":"rv2fr_firmware","vendor":"mitsubishielectric"},{"product":"rv2frl\\(b\\)_firmware","vendor":"mitsubishielectric"},{"product":"rv2frl_firmware","vendor":"mitsubishielectric"},{"product":"rv4fr_firmware","vendor":"mitsubishielectric"},{"product":"rv4frl_firmware","vendor":"mitsubishielectric"},{"product":"rv4frlm\\/c_firmware","vendor":"mitsubishielectric"},{"product":"rv4frm\\/c_firmware","vendor":"mitsubishielectric"},{"product":"rv7fr_firmware","vendor":"mitsubishielectric"},{"product":"rv7frl_firmware","vendor":"mitsubishielectric"},{"product":"rv7frll_firmware","vendor":"mitsubishielectric"},{"product":"rv7frllm\\/c_firmware","vendor":"mitsubishielectric"},{"product":"rv7frlm\\/c_firmware","vendor":"mitsubishielectric"},{"product":"rv7frm\\/c_firmware","vendor":"mitsubishielectric"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[],"description":"Resource management errors vulnerability in a robot controller of MELFA FR Series(controller \"CR800-*V*D\" of RV-*FR***-D-* all versions, controller \"CR800-*HD\" of RH-*FRH***-D-* all versions, controller \"CR800-*HRD\" of RH-*FRHR***-D-* all versions, controller \"CR800-*V*R with R16RTCPU\" of RV-*FR***-R-* all versions, controller \"CR800-*HR with R16RTCPU\" of RH-*FRH***-R-* all versions, controller \"CR800-*HRR with R16RTCPU\" of RH-*FRHR***-R-* all versions, controller \"CR800-*V*Q with Q172DSRCPU\" of RV-*FR***-Q-* all versions, controller \"CR800-*HQ with Q172DSRCPU\" of RH-*FRH***-Q-* all versions, controller \"CR800-*HRQ with Q172DSRCPU\" of RH-*FRHR***-Q-* all versions) and a robot controller of MELFA CR Series(controller \"CR800-CVD\" of RV-8CRL-D-* all versions, controller \"CR800-CHD\" of RH-*CRH**-D-* all versions) as well as a cooperative robot ASSISTA(controller \"CR800-05VD\" of RV-5AS-D-* all versions) allows a remote unauthenticated attacker to cause a DoS of the execution of the robot program and the Ethernet communication by sending a large amount of packets in burst over a short period of time. As a result of DoS, an error may occur. A reset is required to recover it if the error occurs.","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 Robot Controller MELFA FR Series; Robot Controller CR Series; Cooperative Robot ASSISTA","id":"CVE-2021-20586","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Memory corruption in CPU Module Logging Configuration Tool","id":"CVE-2021-20587"},"packages":[],"prev":{"headline":"Information disclosure in Security Verify Access","id":"CVE-2021-20585"},"products":["Robot Controller MELFA FR Series; Robot Controller CR Series; Cooperative Robot ASSISTA"],"published":"2021-01-29","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":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"Remote unauthenticated attackers can cause denial of service in Mitsubishi MELFA and ASSISTA robot controllers by flooding them with burst packets.","url":"https://insights.sbomify.com/CVE-2021-20586/"}