{"answers":{"affected":"It affects 3 products.","exploited":"There is no known exploitation of CVE-2021-42911 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-42911 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-42911 is a critical vulnerability in n/a, published on 29 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-42911 and fix it if it is affected.\n\nWhat it is: CVE-2021-42911 is a critical vulnerability in n/a, published on 29 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-42911 in the wild and no public exploit code.\n\nAffected product: n/a. 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-2021-42911/ (Markdown: https://insights.sbomify.com/CVE-2021-42911/index.md)","id":"CVE-2021-42911","markdown":"https://insights.sbomify.com/CVE-2021-42911/index.md","name":"CVE-2021-42911","record":{"aliases":["GHSA-436r-9cvq-hjq5"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"DrayTek router firmware","requires_auth":"none","summary":"Remote attackers can execute arbitrary code on DrayTek routers via a format string vulnerability in the web interface.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"vigor2960_firmware","vendor":"draytek"},{"product":"vigor300b_firmware","vendor":"draytek"},{"product":"vigor3900_firmware","vendor":"draytek"}],"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-134","name":"Use of Externally-Controlled Format String"}],"description":"A Format String vulnerability exists in DrayTek Vigor 2960 \u003c= 1.5.1.3, DrayTek Vigor 3900 \u003c= 1.5.1.3, and DrayTek Vigor 300B \u003c= 1.5.1.3 in the mainfunction.cgi file via a crafted HTTP message containing malformed QUERY STRING, which could let a remote malicious user execute arbitrary code.","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":"Other in n/a","id":"CVE-2021-42911","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"other","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Command injection in n/a","id":"CVE-2021-42912"},"packages":[],"prev":{"headline":"Command injection in n/a","id":"CVE-2021-42897"},"products":["n/a"],"published":"2022-03-29","related":[{"cvss_score":9.8,"headline":"DrayTek Multiple Vigor Routers OS Command Injection","id":"CVE-2020-15415","kev_date_added":"2024-09-30","published":"2020-06-30"},{"cvss_score":9.8,"headline":"Multiple DrayTek Vigor Routers Web Management Page","id":"CVE-2020-8515","kev_date_added":"2021-11-03","published":"2020-02-01"},{"cvss_score":6.9,"headline":"DrayTek Vigor Routers OS Command Injection","id":"CVE-2024-12987","kev_date_added":"2025-05-15","published":"2024-12-27"},{"cvss_score":9.8,"headline":"Command injection in n/a","id":"CVE-2021-43118","kev_date_added":null,"published":"2022-03-29"},{"cvss_score":9.8,"headline":"Command injection in n/a","id":"CVE-2020-14472","kev_date_added":null,"published":"2020-06-24"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2020-14473","kev_date_added":null,"published":"2020-06-24"}],"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":"2024-08-04","vendors":["n/a"]},"summary":"Remote attackers can execute arbitrary code on DrayTek routers via a format string vulnerability in the web interface.","url":"https://insights.sbomify.com/CVE-2021-42911/"}