{"id":"CVE-2026-42021","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-42021","generatedAt":"2026-10-28T01:19:10.982Z","title":"Multiple stack-based buffer overflow vulnerabilities exist in the boa formIpv6Setup static network configuration functionality of Totolink X2000R TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327.","description":"Multiple stack-based buffer overflow vulnerabilities exist in the boa formIpv6Setup static network configuration functionality of Totolink X2000R TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. A specially crafted HTTP request can lead to arbitrary code execution. An attacker can make an authenticated HTTP request to trigger these vulnerabilities. This vulnerability concerns the static_dns1 parameter.","published":"2026-10-20T21:17:19.000Z","lastModified":"2026-10-23T23:17:44.000Z","status":"Deferred","sourceIdentifier":"talos-cna@cisco.com","cvss":{"version":"3.1","score":9.1,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"},"cwe":["CWE-121"],"affected":[],"epss":{"score":0.00477,"percentile":0.40935,"date":"2026-10-26","history":[{"date":"2026-10-21","score":0.00737,"percentile":0.53926}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.48%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-20T21:17:19.000Z","detail":{"score":"9.1","severity":"CRITICAL","publishedAt":"2026-10-20T21:17:19.140Z"},"summary":"New CVE, critical severity (CVSS 9.1)."}],"references":[{"url":"https://talosintelligence.com/vulnerability_reports/TALOS-2026-2395","source":"talos-cna@cisco.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-42021","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}