{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2873 exists.","fix":"No fix has been published for CVE-2026-2873 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-2873 is a high-severity memory corruption vulnerability in Tenda A21, published on 21 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-2873 and fix it if it is affected.\n\nWhat it is: CVE-2026-2873 is a high-severity memory corruption vulnerability in Tenda A21, published on 21 Feb 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-2026-2873 exists.\n\nAffected product: Tenda A21. 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-2026-2873/ (Markdown: https://insights.sbomify.com/CVE-2026-2873/index.md)","id":"CVE-2026-2873","markdown":"https://insights.sbomify.com/CVE-2026-2873/index.md","name":"CVE-2026-2873","record":{"aliases":["GHSA-6238-4w9x-vrrr"],"analysis":{"component_type":"network_device","fix_type":"no_fix_stated","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Tenda A21 router","requires_auth":"low_privilege","summary":"Remote attackers can trigger a stack-based buffer overflow in the Tenda A21 router's scheduling function, potentially leading to arbitrary code execution.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[{"product":"a21_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-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"A vulnerability was detected in Tenda A21 1.0.0.0. This issue affects the function setSchedWifi of the file /goform/openSchedWifi. Performing a manipulation of the argument schedStartTime/schedEndTime results in stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit is now 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 A21 openSchedWifi setSchedWifi stack-based overflow","id":"CVE-2026-2873","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 A21 fast_setting_wifi_set form_fast_setting_wifi_set stack-based overflow","id":"CVE-2026-2874"},"packages":[],"prev":{"headline":"Tenda A21 MAC Filtering Configuration Endpoint setBlackRule set_device_name stack-based overflow","id":"CVE-2026-2872"},"products":["A21"],"published":"2026-02-21","related":[{"cvss_score":8.7,"headline":"Tenda A21 formSetQosBand set_qosMib_list stack-based overflow","id":"CVE-2026-2870","kev_date_added":null,"published":"2026-02-21"},{"cvss_score":8.7,"headline":"Tenda A21 SetIpMacBind fromSetIpMacBind stack-based overflow","id":"CVE-2026-2871","kev_date_added":null,"published":"2026-02-21"},{"cvss_score":8.7,"headline":"Tenda A21 MAC Filtering Configuration Endpoint setBlackRule set_device_name stack-based overflow","id":"CVE-2026-2872","kev_date_added":null,"published":"2026-02-21"},{"cvss_score":8.7,"headline":"Tenda A21 fast_setting_wifi_set form_fast_setting_wifi_set stack-based overflow","id":"CVE-2026-2874","kev_date_added":null,"published":"2026-02-21"},{"cvss_score":8.7,"headline":"Tenda A21 SetOnlineDevName set_device_name stack-based overflow","id":"CVE-2026-2886","kev_date_added":null,"published":"2026-02-21"}],"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":"2026-02-23","vendors":["Tenda"]},"summary":"Remote attackers can trigger a stack-based buffer overflow in the Tenda A21 router's scheduling function, potentially leading to arbitrary code execution.","url":"https://insights.sbomify.com/CVE-2026-2873/"}