{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-21820 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-21820 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21820 is a critical vulnerability in D-Link, published on 16 Jul 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-2021-21820 and fix it if it is affected.\n\nWhat it is: CVE-2021-21820 is a critical vulnerability in D-Link, published on 16 Jul 2021. 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-2021-21820 in the wild and no public exploit code.\n\nAffected product: D-Link. 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-2021-21820/ (Markdown: https://insights.sbomify.com/CVE-2021-21820/index.md)","id":"CVE-2021-21820","markdown":"https://insights.sbomify.com/CVE-2021-21820/index.md","name":"CVE-2021-21820","record":{"aliases":["GHSA-gmq9-r2m4-2qvg"],"analysis":{"component_type":"network_device","fix_type":"no_fix_stated","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"D-Link router","requires_auth":"none","summary":"Hard-coded credentials in the Libcli Test Environment allow remote attackers to execute arbitrary code on D-Link DIR-3040 routers.","user_interaction":"not_required","vuln_class":"hardcoded_credentials"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"talos","cpe":[{"product":"dir-3040_firmware","vendor":"dlink"}],"cvss":{"score":10,"severity":"critical","source":"cna","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-798","name":"Use of Hard-coded Credentials"}],"description":"A hard-coded password vulnerability exists in the Libcli Test Environment functionality of D-LINK DIR-3040 1.13B03. A specially crafted network request can lead to code execution. An attacker can send a sequence of requests to trigger this vulnerability.","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":"Hardcoded credentials in D-Link","id":"CVE-2021-21820","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"hardcoded_credentials","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Memory corruption in Accusoft","id":"CVE-2021-21821"},"packages":[],"prev":{"headline":"Command injection in D-Link","id":"CVE-2021-21819"},"products":["D-Link"],"published":"2021-07-16","related":[{"cvss_score":10,"headline":"Hardcoded credentials in D-Link","id":"CVE-2021-21913","kev_date_added":null,"published":"2021-09-23"},{"cvss_score":9.8,"headline":"Command injection in n/a","id":"CVE-2022-44832","kev_date_added":null,"published":"2022-12-14"},{"cvss_score":9.1,"headline":"Command injection in D-Link","id":"CVE-2021-21819","kev_date_added":null,"published":"2021-07-16"},{"cvss_score":8.8,"headline":"D-Link DIR-3040 HTTP Request Processing Referer Heap-Based Buffer Overflow Remote Code Execution Vulnerability","id":"CVE-2023-41229","kev_date_added":null,"published":"2024-05-03"},{"cvss_score":8.8,"headline":"Memory corruption in DIR-3040","id":"CVE-2022-43648","kev_date_added":null,"published":"2023-03-29"},{"cvss_score":7.5,"headline":"D-Link DIR-3040 HTTP Request Processing Referer Stack-Based Buffer Overflow Remote Code Execution Vulnerability","id":"CVE-2023-41230","kev_date_added":null,"published":"2024-05-03"}],"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":"Hard-coded credentials in the Libcli Test Environment allow remote attackers to execute arbitrary code on D-Link DIR-3040 routers.","url":"https://insights.sbomify.com/CVE-2021-21820/"}