{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3976 exists.","fix":"No fix has been published for CVE-2026-3976 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-3976 is a high-severity memory corruption vulnerability in Tenda W3, published on 12 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-2026-3976 and fix it if it is affected.\n\nWhat it is: CVE-2026-3976 is a high-severity memory corruption vulnerability in Tenda W3, published on 12 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-2026-3976 exists.\n\nAffected product: Tenda W3. 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-2026-3976/ (Markdown: https://insights.sbomify.com/CVE-2026-3976/index.md)","id":"CVE-2026-3976","markdown":"https://insights.sbomify.com/CVE-2026-3976/index.md","name":"CVE-2026-3976","record":{"aliases":["GHSA-956f-fcv4-hgpq"],"analysis":{"component_type":"network_device","fix_type":"no_fix_stated","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Tenda W3 router","requires_auth":"low_privilege","summary":"Remote attackers can trigger a stack-based buffer overflow in the Tenda W3 router via crafted POST parameters, potentially leading to code execution.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[{"product":"w3_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 weakness has been identified in Tenda W3 1.0.0.3(2204). Impacted is the function formWifiMacFilterSet of the file /goform/WifiMacFilterSet of the component POST Parameter Handler. Executing a manipulation of the argument index/GO can lead to stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks.","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 W3 POST Parameter WifiMacFilterSet formWifiMacFilterSet stack-based overflow","id":"CVE-2026-3976","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":7,"next":{"headline":"projectsend AJAX Endpoints authorization","id":"CVE-2026-3977"},"packages":[],"prev":{"headline":"Tenda W3 POST Parameter WifiMacFilterGet formWifiMacFilterGet stack-based overflow","id":"CVE-2026-3975"},"products":["W3"],"published":"2026-03-12","related":[{"cvss_score":8.7,"headline":"Tenda W3 HTTP setcfm formSetCfm stack-based overflow","id":"CVE-2026-3972","kev_date_added":null,"published":"2026-03-12"},{"cvss_score":8.7,"headline":"Tenda W3 POST Parameter setAutoPing formSetAutoPing stack-based overflow","id":"CVE-2026-3973","kev_date_added":null,"published":"2026-03-12"},{"cvss_score":8.7,"headline":"Tenda W3 HTTP exeCommand formexeCommand stack-based overflow","id":"CVE-2026-3974","kev_date_added":null,"published":"2026-03-12"},{"cvss_score":8.7,"headline":"Tenda W3 POST Parameter WifiMacFilterGet formWifiMacFilterGet stack-based overflow","id":"CVE-2026-3975","kev_date_added":null,"published":"2026-03-12"},{"cvss_score":8.7,"headline":"Tenda W3 POST Parameter wifiSSIDget stack-based overflow","id":"CVE-2026-4007","kev_date_added":null,"published":"2026-03-12"},{"cvss_score":8.7,"headline":"Tenda W3 POST Parameter wifiSSIDset stack-based overflow","id":"CVE-2026-4008","kev_date_added":null,"published":"2026-03-12"}],"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":"2026-03-12","vendors":["Tenda"]},"summary":"Remote attackers can trigger a stack-based buffer overflow in the Tenda W3 router via crafted POST parameters, potentially leading to code execution.","url":"https://insights.sbomify.com/CVE-2026-3976/"}