CVE-2026-42020

{"id": "CVE-2026-42020", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42020", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-10-28T17:53:06.786596Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "talos-cna@cisco.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.3}]}, "affected": [{"source": "talos-cna@cisco.com", "affectedData": [{"vendor": "totolink", "product": "Totolink", "versions": [{"status": "affected", "version": "TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327"}], "defaultStatus": "unaffected"}]}], "published": "2026-10-20T21:17:19.020", "references": [{"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2026-2394", "source": "talos-cna@cisco.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "talos-cna@cisco.com", "description": [{"lang": "en", "value": "CWE-121"}]}], "descriptions": [{"lang": "en", "value": "Multiple stack-based buffer overflow vulnerabilities exist in the boa formIpv6Setup pppoe 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 pppoe_dns2 parameter."}], "lastModified": "2026-10-28T20:17:25.850", "sourceIdentifier": "talos-cna@cisco.com"}