{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-42021", "assignerOrgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b", "state": "PUBLISHED", "assignerShortName": "talos", "dateReserved": "2026-04-23T14:17:27.876Z", "datePublished": "2026-10-20T20:25:23.513Z", "dateUpdated": "2026-10-20T20:25:23.513Z"}, "containers": {"cna": {"affected": [{"vendor": "totolink", "product": "Totolink", "versions": [{"status": "affected", "version": "TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-121: Stack-based Buffer Overflow", "type": "CWE", "cweId": "CWE-121"}]}], "metrics": [{"cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "CRITICAL", "baseScore": 9.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"}}], "providerMetadata": {"orgId": "b86d76f8-0f8a-4a96-a78d-d8abfc7fc29b", "shortName": "talos", "dateUpdated": "2026-10-20T20:25:23.513Z"}, "references": [{"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2026-2395", "name": "https://talosintelligence.com/vulnerability_reports/TALOS-2026-2395"}], "credits": [{"lang": "en", "value": "Discovered by Lilith Wyatt of Cisco Talos"}]}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Totolink", "vendor": "totolink", "versions": [{"status": "affected", "version": "TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327"}]}], "source": "talos-cna@cisco.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-42021", "lastModified": "2026-10-20T21:17:19.140", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 6.0, "source": "talos-cna@cisco.com", "type": "Primary"}]}, "published": "2026-10-20T21:17:19.140", "references": [{"source": "talos-cna@cisco.com", "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2026-2395"}], "sourceIdentifier": "talos-cna@cisco.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}], "source": "talos-cna@cisco.com", "type": "Primary"}]}

{}

{"created": "2026-10-20T22:15:07.430803+00:00", "title": "Stack-Based Buffer Overflow in Totolink X2000R HTTP Interface Leading to Arbitrary Code Execution", "updated": "2026-10-20T22:15:07.430808+00:00", "vendors": []}