{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2021-4464 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-4464 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-4464 is a critical memory corruption vulnerability in FiberHome AN5506-04-FA, published on 12 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-4464 and fix it if it is affected.\n\nWhat it is: CVE-2021-4464 is a critical memory corruption vulnerability in FiberHome AN5506-04-FA, published on 12 Nov 2025. 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-2021-4464 in the wild and no public exploit code.\n\nAffected product: FiberHome AN5506-04-FA. 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-2021-4464/ (Markdown: https://insights.sbomify.com/CVE-2021-4464/index.md)","id":"CVE-2021-4464","markdown":"https://insights.sbomify.com/CVE-2021-4464/index.md","name":"CVE-2021-4464","record":{"aliases":["GHSA-9m65-3xwh-873p"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"FiberHome router","requires_auth":"none","summary":"Remote attackers can trigger a stack buffer overflow in FiberHome routers via oversized HTTP cookies, potentially executing arbitrary code or causing a crash.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-121","name":"Stack-based Buffer Overflow"}],"description":"FiberHome AN5506-04-FA firmware versions up to and including RP2631 and HG6245D prior to RP2602 contain a stack-based buffer overflow, as the HTTP service ('webs') fails to enforce maximum lengths for Cookie header values. When a cookie longer than 511 bytes is processed, a stack buffer is overrun, leading to a crash or potential control of execution flow.","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":"FIberHome AN5506-04-FA / HG6245D Routers Remote Stack Overflow","id":"CVE-2021-4464","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"ReQuest Serious Play F3 Media Server \u003c= 7.0.3 Remote DoS","id":"CVE-2021-4465"},"packages":[],"prev":{"headline":"Longjing Technology BEMS API \u003c= 1.21 Remote Arbitrary File Download","id":"CVE-2021-4463"},"products":["AN5506-04-FA","HG6245D"],"published":"2025-11-12","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2025-11-21","vendors":["FiberHome"]},"summary":"Remote attackers can trigger a stack buffer overflow in FiberHome routers via oversized HTTP cookies, potentially executing arbitrary code or causing a crash.","url":"https://insights.sbomify.com/CVE-2021-4464/"}