{"answers":{"affected":"It affects 2 products.","exploited":"Yes. Attackers have exploited CVE-2021-20090 in the wild since at least 3 Nov 2021.","fix":"No fix has been published for CVE-2021-20090 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 17 Nov 2021.","what":"CVE-2021-20090 is a critical path traversal vulnerability in Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3, published on 29 Apr 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-2021-20090 and fix it if it is affected.\n\nWhat it is: CVE-2021-20090 is a critical path traversal vulnerability in Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3, published on 29 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2021-20090 in the wild since at least 3 Nov 2021.\n\nAffected product: Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3. 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-2021-20090/ (Markdown: https://insights.sbomify.com/CVE-2021-20090/index.md)","id":"CVE-2021-20090","markdown":"https://insights.sbomify.com/CVE-2021-20090/index.md","name":"CVE-2021-20090","record":{"aliases":["GHSA-6466-44wr-c6vv"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Buffalo wireless router","requires_auth":"none","summary":"Unauthenticated attackers can exploit a path traversal flaw in Buffalo router web interfaces to bypass authentication mechanisms.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"tenable","cpe":[{"product":"wsr-2533dhp3-bk_firmware","vendor":"buffalo"},{"product":"wsr-2533dhpl2-bk_firmware","vendor":"buffalo"}],"cvss":{"score":9.8,"severity":"critical","source":"cisa-adp","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-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"A path traversal vulnerability in the web interfaces of Buffalo WSR-2533DHPL2 firmware version \u003c= 1.02 and WSR-2533DHP3 firmware version \u003c= 1.24 could allow unauthenticated remote attackers to bypass authentication.","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-2021-20090.yaml","stars":null,"title":"Buffalo WSR-2533DHPL2 - Path Traversal"}],"tier":"exploited"},"has_fix":null,"headline":"Arcadyan Buffalo Firmware Path Traversal","id":"CVE-2021-20090","indexable":true,"kev":{"dateAdded":"2021-11-03","dueDate":"2021-11-17","knownRansomwareCampaignUse":"Unknown","product":"Buffalo Firmware","requiredAction":"Apply updates per vendor instructions.","vendorProject":"Arcadyan","vulnerabilityName":"Arcadyan Buffalo Firmware Path Traversal Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"Command injection in Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3","id":"CVE-2021-20091"},"packages":[],"prev":{"headline":"Other in purl","id":"CVE-2021-20089"},"products":["Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3"],"published":"2021-04-29","related":[{"cvss_score":8.8,"headline":"Command injection in Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3","id":"CVE-2021-20091","kev_date_added":null,"published":"2021-04-29"},{"cvss_score":7.5,"headline":"Information disclosure in Buffalo WSR-2533DHPL2, Buffalo WSR-2533DHP3","id":"CVE-2021-20092","kev_date_added":null,"published":"2021-04-29"}],"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":"open","licence":"CC0 1.0","name":"CISA KEV"},{"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":"yes","exploitation":"active","technical_impact":"total"},"state":"PUBLISHED","updated":"2025-10-21","vendors":["n/a"]},"summary":"Unauthenticated attackers can exploit a path traversal flaw in Buffalo router web interfaces to bypass authentication mechanisms.","url":"https://insights.sbomify.com/CVE-2021-20090/"}