{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-20161 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-20161 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-20161 is a medium-severity authentication bypass vulnerability in Trendnet AC2600 TEW-827DRU, published on 30 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-2021-20161 and fix it if it is affected.\n\nWhat it is: CVE-2021-20161 is a medium-severity authentication bypass vulnerability in Trendnet AC2600 TEW-827DRU, published on 30 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-2021-20161 in the wild and no public exploit code.\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-2021-20161/ (Markdown: https://insights.sbomify.com/CVE-2021-20161/index.md)","id":"CVE-2021-20161","markdown":"https://insights.sbomify.com/CVE-2021-20161/index.md","name":"CVE-2021-20161","record":{"aliases":["GHSA-mx5q-v692-hx4m"],"analysis":{"component_type":"network_device","fix_type":"no_fix_stated","impacts":["privilege_escalation","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Trendnet wireless router","requires_auth":"none","summary":"Attackers with physical access can connect to the UART port to gain a root shell without authentication, allowing full device control.","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":6.8,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:P/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"},{"id":"CWE-287","name":"Improper Authentication"}],"description":"Trendnet AC2600 TEW-827DRU version 2.08B01 does not have sufficient protections for the UART functionality. A malicious actor with physical access to the device is able to connect to the UART port via a serial connection. No username or password is required and the user is given a root shell with full control of the device.","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 Trendnet AC2600 TEW-827DRU","id":"CVE-2021-20161","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":"Hardcoded credentials in Trendnet AC2600 TEW-827DRU","id":"CVE-2021-20162"},"packages":[],"prev":{"headline":"Command injection in Trendnet AC2600 TEW-827DRU","id":"CVE-2021-20160"},"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":"Auth bypass in Trendnet AC2600 TEW-827DRU","id":"CVE-2021-20158","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)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"Attackers with physical access can connect to the UART port to gain a root shell without authentication, allowing full device control.","url":"https://insights.sbomify.com/CVE-2021-20161/"}