{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-20158 exists.","fix":"No fix has been published for CVE-2021-20158 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-20158 is a critical authentication bypass vulnerability in Trendnet AC2600 TEW-827DRU, published on 30 Dec 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-2021-20158 and fix it if it is affected.\n\nWhat it is: CVE-2021-20158 is a critical authentication bypass vulnerability in Trendnet AC2600 TEW-827DRU, published on 30 Dec 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-20158 exists.\n\nAffected product: Trendnet AC2600 TEW-827DRU. 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-2021-20158/ (Markdown: https://insights.sbomify.com/CVE-2021-20158/index.md)","id":"CVE-2021-20158","markdown":"https://insights.sbomify.com/CVE-2021-20158/index.md","name":"CVE-2021-20158","record":{"aliases":["GHSA-3r6m-8r6h-j558"],"analysis":{"component_type":"network_device","fix_type":"no_fix_stated","impacts":["privilege_escalation","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Trendnet wireless router","requires_auth":"none","summary":"An unauthenticated attacker can change the admin password via a hidden command, gaining full control of the Trendnet router.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"tenable","cpe":[{"product":"tew-827dru_firmware","vendor":"trendnet"}],"cvss":{"score":9.8,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"}],"description":"Trendnet AC2600 TEW-827DRU version 2.08B01 contains an authentication bypass vulnerability. It is possible for an unauthenticated, malicous actor to force the change of the admin password due to a hidden administrative command.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":1,"refs":[{"date":null,"kind":"nuclei","ref":"http/cves/2021/CVE-2021-20158.yaml","stars":null,"title":"Trendnet AC2600 TEW-827DRU 2.08B01 - Admin Password Change"}],"tier":"weaponised"},"has_fix":null,"headline":"Auth bypass in Trendnet AC2600 TEW-827DRU","id":"CVE-2021-20158","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Command injection in Trendnet AC2600 TEW-827DRU","id":"CVE-2021-20159"},"packages":[],"prev":{"headline":"Denial of service in Trendnet AC2600 TEW-827DRU","id":"CVE-2021-20157"},"products":["Trendnet AC2600 TEW-827DRU"],"published":"2021-12-30","related":[{"cvss_score":10,"headline":"Command injection in n/a","id":"CVE-2024-28354","kev_date_added":null,"published":"2024-03-15"},{"cvss_score":10,"headline":"Auth bypass in Trendnet AC2600 TEW-827DRU","id":"CVE-2021-20151","kev_date_added":null,"published":"2021-12-30"},{"cvss_score":9.8,"headline":"Missing authorization in Trendnet AC2600 TEW-827DRU","id":"CVE-2021-20149","kev_date_added":null,"published":"2021-12-30"},{"cvss_score":9.8,"headline":"Hardcoded credentials in Trendnet AC2600 TEW-827DRU","id":"CVE-2021-20155","kev_date_added":null,"published":"2021-12-30"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2020-14080","kev_date_added":null,"published":"2020-06-15"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2019-13276","kev_date_added":null,"published":"2019-07-10"}],"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)"},{"class":"attribution","licence":"MIT","name":"Nuclei templates"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"An unauthenticated attacker can change the admin password via a hidden command, gaining full control of the Trendnet router.","url":"https://insights.sbomify.com/CVE-2021-20158/"}