{"answers":{"affected":"It affects 19 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-27866 exists.","fix":"No fix has been published for CVE-2020-27866 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-27866 is a high-severity authentication bypass vulnerability in Netgear R6020 Firmware, published on 11 Feb 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-2020-27866 and fix it if it is affected.\n\nWhat it is: CVE-2020-27866 is a high-severity authentication bypass vulnerability in Netgear R6020 Firmware, published on 11 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-27866 exists.\n\nAffected product: Netgear R6020 Firmware. 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-2020-27866/ (Markdown: https://insights.sbomify.com/CVE-2020-27866/index.md)","id":"CVE-2020-27866","markdown":"https://insights.sbomify.com/CVE-2020-27866/index.md","name":"CVE-2020-27866","record":{"aliases":["GHSA-mj6p-ghhj-r3q4"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["security_bypass","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"NETGEAR router","requires_auth":"none","summary":"Network-adjacent attackers can bypass authentication on NETGEAR routers via flawed string matching in mini_httpd, potentially leading to root code execution.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"zdi","cpe":[{"product":"ac2100_firmware","vendor":"netgear"},{"product":"ac2400_firmware","vendor":"netgear"},{"product":"ac2600_firmware","vendor":"netgear"},{"product":"r6020_firmware","vendor":"netgear"},{"product":"r6080_firmware","vendor":"netgear"},{"product":"r6120_firmware","vendor":"netgear"},{"product":"r6220_firmware","vendor":"netgear"},{"product":"r6230_firmware","vendor":"netgear"},{"product":"r6260_firmware","vendor":"netgear"},{"product":"r6330_firmware","vendor":"netgear"},{"product":"r6350_firmware","vendor":"netgear"},{"product":"r6700_firmware","vendor":"netgear"},{"product":"r6800_firmware","vendor":"netgear"},{"product":"r6850_firmware","vendor":"netgear"},{"product":"r6900_firmware","vendor":"netgear"},{"product":"r7200_firmware","vendor":"netgear"},{"product":"r7350_firmware","vendor":"netgear"},{"product":"r7400_firmware","vendor":"netgear"},{"product":"r7450_firmware","vendor":"netgear"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"},{"id":"CWE-288","name":"Authentication Bypass Using an Alternate Path or Channel"}],"description":"This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.","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/2020/CVE-2020-27866.yaml","stars":null,"title":"NETGEAR - Authentication Bypass"}],"tier":"weaponised"},"has_fix":null,"headline":"Auth bypass in Multiple Routers","id":"CVE-2020-27866","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"netgear:r6020_firmware","products":["netgear:r6020_firmware","netgear:r6080_firmware","netgear:r6120_firmware","netgear:r6220_firmware","netgear:r6260_firmware","netgear:r6700_firmware","netgear:r6800_firmware","netgear:r6900_firmware"],"type":"auth_bypass","year":"2020"},"n_packages":0,"n_references":2,"next":{"headline":"Command injection in Multiple Routers","id":"CVE-2020-27867"},"packages":[],"prev":{"headline":"Auth bypass in DAP-1860","id":"CVE-2020-27865"},"products":["Multiple Routers"],"published":"2021-02-11","related":[{"cvss_score":10,"headline":"Missing authorization in n/a","id":"CVE-2021-38516","kev_date_added":null,"published":"2021-08-11"},{"cvss_score":9.9,"headline":"Memory corruption in n/a","id":"CVE-2021-29068","kev_date_added":null,"published":"2021-03-23"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2020-35795","kev_date_added":null,"published":"2020-12-29"},{"cvss_score":9.4,"headline":"Misconfiguration in n/a","id":"CVE-2020-35800","kev_date_added":null,"published":"2020-12-29"},{"cvss_score":9.4,"headline":"Auth bypass in n/a","id":"CVE-2020-26927","kev_date_added":null,"published":"2020-10-09"},{"cvss_score":8.8,"headline":"Auth bypass in Multiple Routers","id":"CVE-2021-34865","kev_date_added":null,"published":"2022-01-25"}],"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":"2024-08-04","vendors":["NETGEAR"]},"summary":"Network-adjacent attackers can bypass authentication on NETGEAR routers via flawed string matching in mini_httpd, potentially leading to root code execution.","url":"https://insights.sbomify.com/CVE-2020-27866/"}