{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4903 exists.","fix":"No fix has been published for CVE-2026-4903 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-4903 is a high-severity memory corruption vulnerability in Tenda AC5, published on 26 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-4903 and fix it if it is affected.\n\nWhat it is: CVE-2026-4903 is a high-severity memory corruption vulnerability in Tenda AC5, published on 26 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4903 exists.\n\nAffected product: Tenda AC5. 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-2026-4903/ (Markdown: https://insights.sbomify.com/CVE-2026-4903/index.md)","id":"CVE-2026-4903","markdown":"https://insights.sbomify.com/CVE-2026-4903/index.md","name":"CVE-2026-4903","record":{"aliases":["GHSA-39fw-r4pr-87rj"],"analysis":{"component_type":"network_device","fix_type":"no_fix_stated","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Tenda AC5 router","requires_auth":"low_privilege","summary":"Remote attackers can trigger a stack-based buffer overflow in the Tenda AC5 router via a crafted POST request, potentially leading to code execution or service disruption.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[{"product":"ac5_firmware","vendor":"tenda"}],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-121","name":"Stack-based Buffer Overflow"},{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"A flaw has been found in Tenda AC5 15.03.06.47. This vulnerability affects the function formQuickIndex of the file /goform/QuickIndex of the component POST Request Handler. This manipulation of the argument PPPOEPassword causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been published and may be used.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"Tenda AC5 POST Request QuickIndex formQuickIndex memory corruption","id":"CVE-2026-4903","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"Tenda AC5 POST Request setcfm formSetCfm stack-based overflow","id":"CVE-2026-4904"},"packages":[],"prev":{"headline":"Tenda AC5 POST Request addressNat fromAddressNat memory corruption","id":"CVE-2026-4902"},"products":["AC5"],"published":"2026-03-26","related":[{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2023-41553","kev_date_added":null,"published":"2023-08-30"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2023-41556","kev_date_added":null,"published":"2023-08-30"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2023-41557","kev_date_added":null,"published":"2023-08-30"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2023-41559","kev_date_added":null,"published":"2023-08-30"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2023-41561","kev_date_added":null,"published":"2023-08-30"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2023-41562","kev_date_added":null,"published":"2023-08-30"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2023-41563","kev_date_added":null,"published":"2023-08-30"}],"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":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-03-27","vendors":["Tenda"]},"summary":"Remote attackers can trigger a stack-based buffer overflow in the Tenda AC5 router via a crafted POST request, potentially leading to code execution or service disruption.","url":"https://insights.sbomify.com/CVE-2026-4903/"}