{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-8940 exists.","fix":"No fix has been published for CVE-2025-8940 yet. Limit exposure of the affected software until one is available.","what":"CVE-2025-8940 is a high-severity memory corruption vulnerability in Tenda AC20, published on 14 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-8940 and fix it if it is affected.\n\nWhat it is: CVE-2025-8940 is a high-severity memory corruption vulnerability in Tenda AC20, published on 14 Aug 2025. 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-2025-8940 exists.\n\nAffected product: Tenda AC20. 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-2025-8940/ (Markdown: https://insights.sbomify.com/CVE-2025-8940/index.md)","id":"CVE-2025-8940","markdown":"https://insights.sbomify.com/CVE-2025-8940/index.md","name":"CVE-2025-8940","record":{"aliases":["GHSA-qjx8-48f6-78fq"],"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 AC20 router","requires_auth":"low_privilege","summary":"Remote attackers can trigger a buffer overflow in the Tenda AC20 router via the saveParentControlInfo function, 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":"ac20_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-120","name":"Buffer Copy without Checking Size of Input"},{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"A vulnerability was identified in Tenda AC20 up to 16.03.08.12. Affected by this vulnerability is the function strcpy of the file /goform/saveParentControlInfo. The manipulation of the argument Time leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public 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 AC20 saveParentControlInfo strcpy buffer overflow","id":"CVE-2025-8940","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2025"},"n_packages":0,"n_references":6,"next":{"headline":"Linux-pam: incomplete fix for cve-2025-6020","id":"CVE-2025-8941"},"packages":[],"prev":{"headline":"Tenda AC20 WifiGuestSet buffer overflow","id":"CVE-2025-8939"},"products":["AC20"],"published":"2025-08-14","related":[{"cvss_score":8.7,"headline":"Tenda AC20 PowerSaveSet sscanf buffer overflow","id":"CVE-2025-15356","kev_date_added":null,"published":"2025-12-30"},{"cvss_score":8.7,"headline":"Tenda AC20 httpd setPptpUserList formSetPPTPUserList stack-based overflow","id":"CVE-2025-14654","kev_date_added":null,"published":"2025-12-14"},{"cvss_score":8.7,"headline":"Tenda AC20 httpd SetSysAutoRebbotCfg formSetRebootTimer stack-based overflow","id":"CVE-2025-14655","kev_date_added":null,"published":"2025-12-14"},{"cvss_score":8.7,"headline":"Tenda AC20 openSchedWifi httpd buffer overflow","id":"CVE-2025-14656","kev_date_added":null,"published":"2025-12-14"},{"cvss_score":8.7,"headline":"Tenda AC20 WifiExtraSet buffer overflow","id":"CVE-2025-13258","kev_date_added":null,"published":"2025-11-17"},{"cvss_score":8.7,"headline":"Tenda AC20 fast_setting_wifi_set sscanf buffer overflow","id":"CVE-2025-11385","kev_date_added":null,"published":"2025-10-07"},{"cvss_score":8.7,"headline":"Tenda AC20 HTTP POST Request SetPptpServerCfg strcpy buffer overflow","id":"CVE-2025-10815","kev_date_added":null,"published":"2025-09-22"}],"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":"2025-08-15","vendors":["Tenda"]},"summary":"Remote attackers can trigger a buffer overflow in the Tenda AC20 router via the saveParentControlInfo function, potentially leading to code execution or service disruption.","url":"https://insights.sbomify.com/CVE-2025-8940/"}