{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4252 exists.","fix":"No fix has been published for CVE-2026-4252 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-4252 is a critical authentication bypass vulnerability in Tenda Ac8 Firmware, published on 16 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-4252 and fix it if it is affected.\n\nWhat it is: CVE-2026-4252 is a critical authentication bypass vulnerability in Tenda Ac8 Firmware, published on 16 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4252 exists.\n\nAffected product: Tenda Ac8 Firmware. 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-2026-4252/ (Markdown: https://insights.sbomify.com/CVE-2026-4252/index.md)","id":"CVE-2026-4252","markdown":"https://insights.sbomify.com/CVE-2026-4252/index.md","name":"CVE-2026-4252","record":{"aliases":["GHSA-7fp9-cvqr-rwmf"],"analysis":{"component_type":"network_device","fix_type":"no_fix_stated","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Tenda AC8 router","requires_auth":"none","summary":"Attackers can bypass authentication on Tenda AC8 routers by exploiting IPv6 address reliance in the check_is_ipv6 function.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[{"product":"ac8_firmware","vendor":"tenda"}],"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/E:P","version":"4.0"},"cwes":[{"id":"CWE-291","name":"Reliance on IP Address for Authentication"},{"id":"CWE-287","name":"Improper Authentication"}],"description":"A vulnerability was identified in Tenda AC8 16.03.50.11. Affected by this issue is the function check_is_ipv6 of the component IPv6 Handler. The manipulation leads to reliance on ip address for authentication. It is possible to initiate the attack remotely. The exploit is publicly available and might 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 AC8 IPv6 check_is_ipv6 ip address for authentication","id":"CVE-2026-4252","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"tenda:ac8_firmware","products":["tenda:ac8_firmware"],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"Tenda AC8 Web UploadCfg route_set_user_policy_rule os command injection","id":"CVE-2026-4253"},"packages":[],"prev":{"headline":"CityData CityChat ai.citydata.citychat credentials.json credentials storage","id":"CVE-2026-4251"},"products":["AC8"],"published":"2026-03-16","related":[{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2025-29100","kev_date_added":null,"published":"2025-03-24"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2025-25663","kev_date_added":null,"published":"2025-02-20"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2025-25664","kev_date_added":null,"published":"2025-02-20"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2025-25667","kev_date_added":null,"published":"2025-02-20"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2025-25668","kev_date_added":null,"published":"2025-02-20"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2024-46652","kev_date_added":null,"published":"2024-09-20"},{"cvss_score":9.8,"headline":"Tenda AC8 formSetDeviceName stack-based overflow","id":"CVE-2023-4744","kev_date_added":null,"published":"2023-09-03"}],"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":"yes","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-03-16","vendors":["Tenda"]},"summary":"Attackers can bypass authentication on Tenda AC8 routers by exploiting IPv6 address reliance in the check_is_ipv6 function.","url":"https://insights.sbomify.com/CVE-2026-4252/"}