{"answers":{"affected":"It affects 8 products.","exploited":"There is no known exploitation of CVE-2021-20594 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-20594 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-20594 is a high-severity vulnerability in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU, published on 6 Aug 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-2021-20594 and fix it if it is affected.\n\nWhat it is: CVE-2021-20594 is a high-severity vulnerability in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU, published on 6 Aug 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-2021-20594 in the wild and no public exploit code.\n\nAffected product: Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU. 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-2021-20594/ (Markdown: https://insights.sbomify.com/CVE-2021-20594/index.md)","id":"CVE-2021-20594","markdown":"https://insights.sbomify.com/CVE-2021-20594/index.md","name":"CVE-2021-20594","record":{"aliases":["GHSA-3852-pg93-43w3"],"analysis":{"component_type":"ics_ot","fix_type":"patch","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Mitsubishi PLC firmware","requires_auth":"none","summary":"Remote attackers can brute-force user names on Mitsubishi MELSEC iQ-R Safety and SIL2 Process CPU modules, exposing sensitive account information.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Mitsubishi","cpe":[{"product":"r08psfcpu_firmware","vendor":"mitsubishielectric"},{"product":"r08sfcpu_firmware","vendor":"mitsubishielectric"},{"product":"r120psfcpu_firmware","vendor":"mitsubishielectric"},{"product":"r120sfcpu_firmware","vendor":"mitsubishielectric"},{"product":"r16psfcpu_firmware","vendor":"mitsubishielectric"},{"product":"r16sfcpu_firmware","vendor":"mitsubishielectric"},{"product":"r32psfcpu_firmware","vendor":"mitsubishielectric"},{"product":"r32sfcpu_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:H/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU firmware versions \"26\" and prior and Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU firmware versions \"11\" and prior allows a remote unauthenticated attacker to acquire legitimate user names registered in the module via brute-force attack on user names.","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":"Information disclosure in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU","id":"CVE-2021-20594","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"XML external entity in Air Conditioning System/Centralized Controllers G-50A; GB-50A; GB-24A; AG-150A-A; AG-150A-J; GB-50ADA-A; GB-50ADA-J; EB-50GU-A; EB-50GU-J; AE-200A; AE-200E; AE-50A; AE-50E; EW-50A; EW-50E; TE-200A; TE-50A; TW-50A; CMS-RMD-J; Air Conditioning System/Expansion Controllers PAC-YG50ECA; Air Conditioning System/BM adapter BAC-HD150","id":"CVE-2021-20595"},"packages":[],"prev":{"headline":"Auth bypass in Air Conditioning System/Centralized Controllers G-50A; GB-50A; AG-150A-A; AG-150A-J; GB-50ADA-A; GB-50ADA-J; EB-50GU-A; EB-50GU-J; AE-200A; AE-200E; AE-50A; AE-50E; EW-50A; EW-50E; TE-200A; TE-50A; TW-50A; CMS-RMD-J; Air Conditioning System/Expansion Controllers PAC-YG50ECA","id":"CVE-2021-20593"},"products":["Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU"],"published":"2021-08-06","related":[{"cvss_score":9.1,"headline":"Information disclosure in MELSEC iQ-R Series SIL2 Process CPU R08PSFCPU","id":"CVE-2021-20599","kev_date_added":null,"published":"2021-10-14"},{"cvss_score":9.1,"headline":"Information disclosure in Mitsubishi Electric MELSEC iQ-R series Safety CPU modules R08/16/32/120SFCPU; Mitsubishi Electric MELSEC iQ-R series SIL2 Process CPU modules R08/16/32/120PSFCPU","id":"CVE-2021-20597","kev_date_added":null,"published":"2021-08-06"},{"cvss_score":6.5,"headline":"Information disclosure in MELSEC iQ-R Series SIL2 Process CPU R08PSFCPU","id":"CVE-2023-6815","kev_date_added":null,"published":"2024-02-13"},{"cvss_score":5.3,"headline":"Denial of service in MELSEC iQ-R series CPU modules R08/16/32/120SFCPU; R08/16/32/120PSFCPU","id":"CVE-2021-20598","kev_date_added":null,"published":"2021-08-06"}],"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"Remote attackers can brute-force user names on Mitsubishi MELSEC iQ-R Safety and SIL2 Process CPU modules, exposing sensitive account information.","url":"https://insights.sbomify.com/CVE-2021-20594/"}