{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-40556 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-40556 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-40556 is a high-severity memory corruption vulnerability in n/a, published on 6 Oct 2022. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-40556 and fix it if it is affected.\n\nWhat it is: CVE-2021-40556 is a high-severity memory corruption vulnerability in n/a, published on 6 Oct 2022. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-40556 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-2021-40556/ (Markdown: https://insights.sbomify.com/CVE-2021-40556/index.md)","id":"CVE-2021-40556","markdown":"https://insights.sbomify.com/CVE-2021-40556/index.md","name":"CVE-2021-40556","record":{"aliases":["GHSA-9v8q-97m7-4x6q"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"ASUS home router","requires_auth":"low_privilege","summary":"Authenticated attackers can trigger a stack overflow in the httpd service to execute arbitrary commands remotely on ASUS RT-AX56U routers.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"rt-ax56u_firmware","vendor":"asus"}],"cvss":{"score":8.8,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"A stack overflow vulnerability exists in the httpd service in ASUS RT-AX56U Router Version 3.0.0.4.386.44266. This vulnerability is caused by the strcat function called by \"caupload\" input handle function allowing the user to enter 0xFFFF bytes into the stack. This vulnerability allows an attacker to execute commands remotely. The vulnerability requires authentication.","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":"Memory corruption in n/a","id":"CVE-2021-40556","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2021"},"n_packages":0,"n_references":2,"next":{"headline":"Null dereference in n/a","id":"CVE-2021-40559"},"packages":[],"prev":{"headline":"Cross-site scripting in n/a","id":"CVE-2021-40555"},"products":["n/a"],"published":"2022-10-06","related":[{"cvss_score":8.8,"headline":"ASUS RT-AX56U - SQL Injection","id":"CVE-2022-23972","kev_date_added":null,"published":"2022-04-07"},{"cvss_score":8.8,"headline":"ASUS RT-AX56U - Stack overflew","id":"CVE-2022-23973","kev_date_added":null,"published":"2022-04-07"},{"cvss_score":8.1,"headline":"ASUS RT-AX56U - Path Traversal","id":"CVE-2022-23970","kev_date_added":null,"published":"2022-04-07"},{"cvss_score":8.1,"headline":"ASUS RT-AX56U - Path Traversal","id":"CVE-2022-23971","kev_date_added":null,"published":"2022-04-07"},{"cvss_score":8,"headline":"ASUS RT-AX56U Router - Stack-based buffer overflow","id":"CVE-2021-44158","kev_date_added":null,"published":"2022-01-03"},{"cvss_score":6.5,"headline":"ASUS RT-AX56U - Path Traversal","id":"CVE-2022-22054","kev_date_added":null,"published":"2022-01-14"}],"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":"Authenticated attackers can trigger a stack overflow in the httpd service to execute arbitrary commands remotely on ASUS RT-AX56U routers.","url":"https://insights.sbomify.com/CVE-2021-40556/"}