CVE-2026-36604

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Mercusys AC12G (EU) V1 router with firmware AC12G(EU)_V1_200909 does not validate the HTTP Host header, enabling DNS rebinding attacks. An external attacker can rebind a domain to the router's internal IP address, extending the CORS wildcard vulnerability (Access-Control-Allow-Origin: *) to internet-originated attacks."}, {"lang": "es", "value": "El router Mercusys AC12G (EU) V1 con firmware AC12G(EU)_V1_200909 no valida la cabecera HTTP Host, lo que permite ataques de reencuadernaci\u00f3n de DNS. Un atacante externo puede reencuadernar un dominio a la direcci\u00f3n IP interna del router, extendiendo la vulnerabilidad de comod\u00edn CORS (Access-Control-Allow-Origin: *) a ataques originados en internet."}], "id": "CVE-2026-36604", "lastModified": "2026-07-22T19:10:00.120", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-36604", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-06-03T19:41:14.015244Z", "version": "2.0.3"}}]}, "published": "2026-06-03T18:16:21.420", "references": [{"source": "cve@mitre.org", "url": "https://github.com/Tymbark7372/MERCUSYS-AC12G/blob/master/advisories/CVE-2026-36604.md"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-350"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[200909,200909]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "ac12g", "vendor": "mercusys"}], "created": "2026-06-03T18:30:36.292706+00:00", "title": "DNS Rebinding Vulnerability in Mercusys AC12G Router Permits Remote Management Access", "updated": "2026-06-05T10:12:34.960728+00:00", "vendors": ["mercusys", "mercusys$PRODUCT$ac12g"]}