{"answers":{"affected":"It affects 14 products.","exploited":"There is no known exploitation of CVE-2021-20864 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-20864 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-20864 is a high-severity authentication bypass vulnerability in ELECOM routers, published on 1 Dec 2021. 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-2021-20864 and fix it if it is affected.\n\nWhat it is: CVE-2021-20864 is a high-severity authentication bypass vulnerability in ELECOM routers, published on 1 Dec 2021. 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-2021-20864 in the wild and no public exploit code.\n\nAffected product: ELECOM routers. 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-2021-20864/ (Markdown: https://insights.sbomify.com/CVE-2021-20864/index.md)","id":"CVE-2021-20864","markdown":"https://insights.sbomify.com/CVE-2021-20864/index.md","name":"CVE-2021-20864","record":{"aliases":["GHSA-3p76-j79h-ff2w"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["code_execution","security_bypass"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"ELECOM router","requires_auth":"none","summary":"Network-adjacent attackers can bypass access controls to enable Telnet and execute arbitrary OS commands on ELECOM routers.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jpcert","cpe":[{"product":"edwrc-2533gst2_firmware","vendor":"elecom"},{"product":"wrc-1167gst2_firmware","vendor":"elecom"},{"product":"wrc-1167gst2a_firmware","vendor":"elecom"},{"product":"wrc-1167gst2h_firmware","vendor":"elecom"},{"product":"wrc-1750gs_firmware","vendor":"elecom"},{"product":"wrc-1750gsv_firmware","vendor":"elecom"},{"product":"wrc-1900gst_firmware","vendor":"elecom"},{"product":"wrc-2533gs2-b_firmware","vendor":"elecom"},{"product":"wrc-2533gs2-w_firmware","vendor":"elecom"},{"product":"wrc-2533gst2-g_firmware","vendor":"elecom"},{"product":"wrc-2533gst2_firmware","vendor":"elecom"},{"product":"wrc-2533gst2sp_firmware","vendor":"elecom"},{"product":"wrc-2533gst_firmware","vendor":"elecom"},{"product":"wrc-2533gsta_firmware","vendor":"elecom"}],"cvss":{"score":8.8,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[],"description":"Improper access control vulnerability in ELECOM routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware v1.25 and prior, WRC-1167GST2H firmware v1.25 and prior, WRC-2533GS2-B firmware v1.52 and prior, WRC-2533GS2-W firmware v1.52 and prior, WRC-1750GS firmware v1.03 and prior, WRC-1750GSV firmware v2.11 and prior, WRC-1900GST firmware v1.03 and prior, WRC-2533GST firmware v1.03 and prior, WRC-2533GSTA firmware v1.03 and prior, WRC-2533GST2 firmware v1.25 and prior, WRC-2533GST2SP firmware v1.25 and prior, WRC-2533GST2-G firmware v1.25 and prior, and EDWRC-2533GST2 firmware v1.25 and prior) allows a network-adjacent unauthenticated attacker to bypass access restriction, and to start the telnet service and execute an arbitrary OS command via unspecified vectors.","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":"Auth bypass in ELECOM routers","id":"CVE-2021-20864","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Missing authorization in Advanced Custom Fields and Advanced Custom Fields Pro","id":"CVE-2021-20865"},"packages":[],"prev":{"headline":"Command injection in ELECOM routers","id":"CVE-2021-20863"},"products":["ELECOM routers"],"published":"2021-12-01","related":[{"cvss_score":8.8,"headline":"Auth bypass in ELECOM LAN routers","id":"CVE-2022-25915","kev_date_added":null,"published":"2022-03-31"},{"cvss_score":8.8,"headline":"Cross-site request forgery in ELECOM LAN routers","id":"CVE-2021-20860","kev_date_added":null,"published":"2021-12-01"},{"cvss_score":8.8,"headline":"Auth bypass in ELECOM LAN routers","id":"CVE-2021-20861","kev_date_added":null,"published":"2021-12-01"},{"cvss_score":8,"headline":"Command injection in ELECOM LAN routers","id":"CVE-2021-20859","kev_date_added":null,"published":"2021-12-01"},{"cvss_score":8,"headline":"Command injection in ELECOM routers","id":"CVE-2021-20863","kev_date_added":null,"published":"2021-12-01"},{"cvss_score":4.3,"headline":"Missing authorization in ELECOM routers","id":"CVE-2021-20862","kev_date_added":null,"published":"2021-12-01"}],"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":["ELECOM CO.,LTD."]},"summary":"Network-adjacent attackers can bypass access controls to enable Telnet and execute arbitrary OS commands on ELECOM routers.","url":"https://insights.sbomify.com/CVE-2021-20864/"}