{"affected":[{"affectedData":[{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}],"source":"cve@mitre.org"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:asuswrt-merlin:asuswrt-merlin:*:*:*:*:*:*:*:*","matchCriteriaId":"3AF80063-9556-4F96-A317-5D808E0C7058","versionEndIncluding":"382.1_2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"Stack-based buffer overflow in the ej_update_variables function in router/httpd/web.c on ASUS routers (when using software from https://github.com/RMerl/asuswrt-merlin) allows web authenticated attackers to execute code via a request that updates a setting. In ej_update_variables, the length of the variable action_script is not checked, as long as it includes a \"_wan_if\" substring."},{"lang":"es","value":"Desbordamiento de búfer basado en pila en la función ej_update_variables en outer/httpd/web.c en routers ASUS (cuando emplean software de https://github.com/RMerl/asuswrt-merlin) permite que atacantes autenticados en la web ejecuten código mediante una petición que actualiza una configuración. En ej_update_variables, la longitud de la variable action_script no se comprueba, siempre y cuando incluya una subcadena \"_wan_if\"."}],"id":"CVE-2018-5721","lastModified":"2026-06-17T02:00:39.370","metrics":{"cvssMetricV2":[{"acInsufInfo":true,"baseSeverity":"MEDIUM","cvssData":{"accessComplexity":"LOW","accessVector":"NETWORK","authentication":"SINGLE","availabilityImpact":"PARTIAL","baseScore":6.5,"confidentialityImpact":"PARTIAL","integrityImpact":"PARTIAL","vectorString":"AV:N/AC:L/Au:S/C:P/I:P/A:P","version":"2.0"},"exploitabilityScore":8.0,"impactScore":6.4,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":false}],"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"exploitabilityScore":2.8,"impactScore":5.9,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2018-01-17T06:29:00.277","references":[{"source":"cve@mitre.org","tags":["Exploit","Third Party Advisory"],"url":"http://www.w0lfzhang.com/2018/01/17/ASUS-router-stack-overflow-in-http-server/"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Exploit","Third Party Advisory"],"url":"http://www.w0lfzhang.com/2018/01/17/ASUS-router-stack-overflow-in-http-server/"}],"sourceIdentifier":"cve@mitre.org","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-787"}],"source":"nvd@nist.gov","type":"Primary"}]}