{"id":"CVE-2026-17518","state":"PUBLISHED","title":"Buffer Copy without Checking Size of Input in certain ASUS router models allows an adjacent authenticated user to corrupt device operations and cause a denial of service via an HTT","description":"Buffer Copy without Checking Size of Input in certain ASUS router models allows an adjacent authenticated user to corrupt device operations and cause a denial of service via an HTTP request with input exceeding the expected length.\nRefer to the ' Security Update for ASUS Router Firmware' section on the ASUS Security Advisory for more information.","publishedAt":"2026-10-20T02:00:16.884Z","updatedAt":"2026-10-20T19:17:23.552Z","severity":{"score":8.2,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:H","source":"ASUS"},"assigner":"ASUS","products":["ASUS Router"],"affected":[{"vendor":"ASUS","product":"Router","defaultStatus":"unaffected","versions":[{"version":"ASUSWRT 3.0.0.4_386 series","status":"affected","versionType":"custom"},{"version":"ASUSWRT 3.0.0.4_388 series","status":"affected"}]}],"references":["https://www.asus.com/security-advisory"],"weaknesses":["CWE-121"],"ingestedAt":"2026-10-29T20:11:00.674Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/17xxx/CVE-2026-17518.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-17518","state":"PUBLISHED","datePublished":"2026-10-20T02:00:16.884Z","dateUpdated":"2026-10-20T19:17:23.552Z","assignerShortName":"ASUS","assignerOrgId":"54bf65a7-a193-42d2-b1ba-8e150d3c35e1","dateReserved":"2026-07-27T08:03:22.659Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"Buffer Copy without Checking Size of Input in certain ASUS router models allows an adjacent authenticated user to corrupt device operations and cause a denial of service via an HTTP request with input exceeding the expected length.\nRefer to the ' Security Update for ASUS Router Firmware' section on the ASUS Security Advisory for more information."}],"affected":[{"vendor":"ASUS","product":"Router","defaultStatus":"unaffected","versions":[{"version":"ASUSWRT 3.0.0.4_386 series","status":"affected","versionType":"custom"},{"version":"ASUSWRT 3.0.0.4_388 series","status":"affected"}]}],"references":[{"url":"https://www.asus.com/security-advisory"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"ADJACENT","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"HIGH","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"HIGH","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":8.2,"vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:H"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-121","lang":"en","description":"CWE-121: Stack-based Buffer Overflow","type":"CWE"}]}],"providerMetadata":{"shortName":"ASUS","orgId":"54bf65a7-a193-42d2-b1ba-8e150d3c35e1","dateUpdated":"2026-10-20T02:00:16.884Z"},"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:asus:router:asuswrt_3.0.0.4_386_series:*:*:*:*:*:*:*"},{"vulnerable":true,"criteria":"cpe:2.3:a:asus:router:asuswrt_3.0.0.4_388_series:*:*:*:*:*:*:*"}]}]}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 1.0.4"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-20T19:17:05.687736Z","id":"CVE-2026-17518","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-20T19:17:23.552Z"}}]}}}