{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-21740 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-21740 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21740 is a low-severity path traversal vulnerability in ZXHN H2640, published on 9 Aug 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-2021-21740 and fix it if it is affected.\n\nWhat it is: CVE-2021-21740 is a low-severity path traversal vulnerability in ZXHN H2640, published on 9 Aug 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-2021-21740 in the wild and no public exploit code.\n\nAffected product: ZXHN H2640. 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-2021-21740/ (Markdown: https://insights.sbomify.com/CVE-2021-21740/index.md)","id":"CVE-2021-21740","markdown":"https://insights.sbomify.com/CVE-2021-21740/index.md","name":"CVE-2021-21740","record":{"aliases":["GHSA-qj42-4q8c-3r9v"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["data_read"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"ZTE residential gateway","requires_auth":"none","summary":"Attackers can access unauthorized directory information via symbolic links on USB drives in ZTE residential gateways, leading to information disclosure.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"zte","cpe":[{"product":"zxhn_h2640_firmware","vendor":"zte"}],"cvss":{"score":2.4,"severity":"low","source":"nvd","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-59","name":"Improper Link Resolution Before File Access"}],"description":"There is an information leak vulnerability in the digital media player (DMS) of ZTE's residential gateway product. The attacker could insert the USB disk with the symbolic link into the residential gateway, and access unauthorized directory information through the symbolic link, causing information leak.","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":"Path traversal in ZXHN H2640","id":"CVE-2021-21740","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"path_traversal","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Deserialization in ZXV10 M910","id":"CVE-2021-21741"},"packages":[],"prev":{"headline":"Security feature bypass in \u003cZXCTN 6120H\u003e","id":"CVE-2021-21739"},"products":["ZXHN H2640"],"published":"2021-08-09","related":[],"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 can access unauthorized directory information via symbolic links on USB drives in ZTE residential gateways, leading to information disclosure.","url":"https://insights.sbomify.com/CVE-2021-21740/"}