{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-21724 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-21724 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-21724 is a medium-severity denial of service vulnerability in ZXR10 8900E, published on 26 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-2021-21724 and fix it if it is affected.\n\nWhat it is: CVE-2021-21724 is a medium-severity denial of service vulnerability in ZXR10 8900E, published on 26 Feb 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-2021-21724 in the wild and no public exploit code.\n\nAffected product: ZXR10 8900E. 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-2021-21724/ (Markdown: https://insights.sbomify.com/CVE-2021-21724/index.md)","id":"CVE-2021-21724","markdown":"https://insights.sbomify.com/CVE-2021-21724/index.md","name":"CVE-2021-21724","record":{"aliases":["GHSA-fqjw-rgv6-j77q"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"ZTE optical network device","requires_auth":"high_privilege","summary":"A local attacker can cause a memory leak and service disruption by repeatedly attenuating the optical signal on ZTE ZXR10 8900E devices.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"zte","cpe":[{"product":"zxr10_8900e_firmware","vendor":"zte"}],"cvss":{"score":4.4,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-401","name":"Missing Release of Memory after Effective Lifetime"}],"description":"A ZTE product has a memory leak vulnerability. Due to the product's improper handling of memory release in certain scenarios, a local attacker with device permissions repeatedly attenuated the optical signal to cause memory leak and abnormal service. This affects: ZXR10 8900E, all versions up to V3.03.20R2B30P1.","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":"Denial of service in ZXR10 8900E","id":"CVE-2021-21724","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Path traversal in ZXHN H196Q","id":"CVE-2021-21725"},"packages":[],"prev":{"headline":"Denial of service in \u003cZXR10 9904, ZXR10 9908, ZXR10 9916, ZXR10 9904-S, ZXR10 9908-S\u003e","id":"CVE-2021-21723"},"products":["ZXR10 8900E"],"published":"2021-02-26","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":"A local attacker can cause a memory leak and service disruption by repeatedly attenuating the optical signal on ZTE ZXR10 8900E devices.","url":"https://insights.sbomify.com/CVE-2021-21724/"}