{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-31255 exists.","fix":"No fix has been published for CVE-2026-31255 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-31255 is a medium-severity command injection vulnerability in Tenda Ac18 Firmware, published on 27 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-31255 and fix it if it is affected.\n\nWhat it is: CVE-2026-31255 is a medium-severity command injection vulnerability in Tenda Ac18 Firmware, published on 27 Apr 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-2026-31255 exists.\n\nAffected product: Tenda Ac18 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-2026-31255/ (Markdown: https://insights.sbomify.com/CVE-2026-31255/index.md)","id":"CVE-2026-31255","markdown":"https://insights.sbomify.com/CVE-2026-31255/index.md","name":"CVE-2026-31255","record":{"aliases":["GHSA-9h86-xppf-f3p9"],"analysis":{"component_type":"network_device","fix_type":"no_fix_stated","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Tenda AC18 router","requires_auth":"low_privilege","summary":"Attackers can execute arbitrary system commands on Tenda AC18 routers via the SetSambaCfg interface due to improper handling of the guestuser parameter.","user_interaction":"not_required","vuln_class":"command_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"ac18_firmware","vendor":"tenda"}],"cvss":{"score":5.4,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-77","name":"Improper Neutralization of Special Elements used in a Command"}],"description":"A command injection vulnerability exists in Tenda AC18 V15.03.05.05_multi. The vulnerability is located in the /goform/SetSambaCfg interface, where improper handling of the guestuser parameter allows attackers to execute arbitrary system commands.","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":"Command injection in n/a","id":"CVE-2026-31255","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"tenda:ac18_firmware","products":["tenda:ac18_firmware"],"type":"command_injection","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Null dereference in n/a","id":"CVE-2026-31256"},"packages":[],"prev":{"headline":"Code injection in n/a","id":"CVE-2026-31254"},"products":["n/a"],"published":"2026-04-27","related":[{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2024-57575","kev_date_added":null,"published":"2025-01-16"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2024-57579","kev_date_added":null,"published":"2025-01-16"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2024-57580","kev_date_added":null,"published":"2025-01-16"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2024-57581","kev_date_added":null,"published":"2025-01-16"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2024-57582","kev_date_added":null,"published":"2025-01-16"},{"cvss_score":9.8,"headline":"Command injection in n/a","id":"CVE-2024-57583","kev_date_added":null,"published":"2025-01-16"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2024-33835","kev_date_added":null,"published":"2024-05-01"}],"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":"partial"},"state":"PUBLISHED","updated":"2026-04-28","vendors":["n/a"]},"summary":"Attackers can execute arbitrary system commands on Tenda AC18 routers via the SetSambaCfg interface due to improper handling of the guestuser parameter.","url":"https://insights.sbomify.com/CVE-2026-31255/"}