{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2876 exists.","fix":"No fix has been published for CVE-2026-2876 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-2876 is a high-severity memory corruption vulnerability in Tenda A18, 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-2026-2876 and fix it if it is affected.\n\nWhat it is: CVE-2026-2876 is a high-severity memory corruption vulnerability in Tenda A18, 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-2026-2876 exists.\n\nAffected product: Tenda A18. 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-2026-2876/ (Markdown: https://insights.sbomify.com/CVE-2026-2876/index.md)","id":"CVE-2026-2876","markdown":"https://insights.sbomify.com/CVE-2026-2876/index.md","name":"CVE-2026-2876","record":{"aliases":["GHSA-pg46-g938-p94j"],"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 A18 router","requires_auth":"low_privilege","summary":"Remote attackers can trigger a stack-based buffer overflow in the Tenda A18 router's MAC filter rule parser, 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":"a18_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 determined in Tenda A18 15.13.07.13. This affects the function parse_macfilter_rule of the file /goform/setBlackRule. This manipulation of the argument deviceList causes stack-based buffer overflow. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized.","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 A18 setBlackRule parse_macfilter_rule stack-based overflow","id":"CVE-2026-2876","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 A18 Httpd Service WifiExtraSet strcpy stack-based overflow","id":"CVE-2026-2877"},"packages":[],"prev":{"headline":"Tenda A21 fast_setting_wifi_set form_fast_setting_wifi_set stack-based overflow","id":"CVE-2026-2874"},"products":["A18"],"published":"2026-02-21","related":[{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2023-50585","kev_date_added":null,"published":"2024-01-09"},{"cvss_score":8.8,"headline":"Memory corruption in n/a","id":"CVE-2024-32305","kev_date_added":null,"published":"2024-04-17"},{"cvss_score":8.7,"headline":"Tenda A18 Httpd Service WifiExtraSet strcpy stack-based overflow","id":"CVE-2026-2877","kev_date_added":null,"published":"2026-02-21"},{"cvss_score":7.5,"headline":"Memory corruption in n/a","id":"CVE-2023-39827","kev_date_added":null,"published":"2023-08-14"},{"cvss_score":7.5,"headline":"Memory corruption in n/a","id":"CVE-2023-39828","kev_date_added":null,"published":"2023-08-14"},{"cvss_score":7.5,"headline":"Memory corruption in n/a","id":"CVE-2023-39829","kev_date_added":null,"published":"2023-08-14"}],"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 A18 router's MAC filter rule parser, potentially leading to code execution or service disruption.","url":"https://insights.sbomify.com/CVE-2026-2876/"}