CVE-2026-5981

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{"affected": [{"affectedData": [{"modules": ["POST Request Handler"], "product": "DIR-605L", "vendor": "D-Link", "versions": [{"status": "affected", "version": "2.13B01"}]}], "source": "cna@vuldb.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:dlink:dir-605l_firmware:2.13b01:*:*:*:*:*:*:*", "matchCriteriaId": "47A17995-9117-42E4-938E-D18F605DD0FE", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:dlink:dir-605l:-:*:*:*:*:*:*:*", "matchCriteriaId": "CD4E3AA2-EC1C-4219-8E13-B52D30A7FA06", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [{"sourceIdentifier": "cna@vuldb.com", "tags": ["unsupported-when-assigned"]}], "descriptions": [{"lang": "en", "value": "A vulnerability has been found in D-Link DIR-605L 2.13B01. This affects the function formAdvFirewall of the file /goform/formAdvFirewall of the component POST Request Handler. Such manipulation of the argument curTime leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. This vulnerability only affects products that are no longer supported by the maintainer."}, {"lang": "es", "value": "Se ha encontrado una vulnerabilidad en D-Link DIR-605L 2.13B01. Esto afecta a la funci\u00f3n formAdvFirewall del archivo /goform/formAdvFirewall del componente Gestor de Solicitudes POST. Dicha manipulaci\u00f3n del argumento curTime conduce a un desbordamiento de b\u00fafer. El ataque puede ser lanzado remotamente. El exploit ha sido divulgado al p\u00fablico y puede ser utilizado. Esta vulnerabilidad solo afecta a productos que ya no son compatibles con el mantenedor."}], "id": "CVE-2026-5981", "lastModified": "2026-10-26T21:10:00.170", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "COMPLETE", "baseScore": 9.0, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "cna@vuldb.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5981", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-13T20:37:45.451841Z", "version": "2.0.3"}}]}, "published": "2026-04-09T22:16:37.233", "references": [{"source": "cna@vuldb.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://lavender-bicycle-a5a.notion.site/D-Link-DIR-605L-formAdvFirewall-33153a41781f80678733f4b12282f3fa?source=copy_link"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/submit/791854"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/vuln/356535"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/vuln/356535/cti"}, {"source": "cna@vuldb.com", "tags": ["Product"], "url": "https://www.dlink.com/"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-120"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "2.13B01"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "DIR-605L", "source": "cna", "vendor": "D-Link"}, "product": "dir-605l", "vendor": "d-link"}], "analysis": {"en": {"generated_at": "2026-04-09T22:42:18.373004+00:00", "value": {"mitigation_remediation": ["Check the D\u2011Link website or relevant download portals for any firmware update that addresses the buffer overflow in the formAdvFirewall handler. If a patch is unavailable, isolate the router from untrusted networks by applying firewall rules or network segmentation. Consider disabling the advanced firewall configuration interface or limiting HTTP access to the router only from trusted internal IP ranges. Monitor router logs for unusual POST requests to the /goform/formAdvFirewall endpoint and block offending traffic if detected."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "Devices affected are only the D\u2011Link DIR\u2011605L routers running firmware version 2.13B01. No other vendors or products are listed and the issue is limited to models that are no longer supported by the maintainer.", "description_and_impact": "The vulnerability is a classic buffer overflow triggered by manipulating the curTime parameter in the POST request to the /goform/formAdvFirewall endpoint. This overflow can be exploited remotely to gain arbitrary code execution on the affected device, compromising confidentiality, integrity, and availability of the network. The issue is categorized under CWE\u2011119 and CWE\u2011120.", "risk_and_exploitability": "The CVSS score of 8.7 classifies the vulnerability as high severity, and the lack of an EPSS score or KEV listing indicates that it has not yet been widely exploited in known attacks, but the exploit is publicly disclosed and can be used remotely. Attackers do not need local access; a remote attacker can trigger the overflow by sending a specially crafted POST request to the formAdvFirewall handler and potentially achieve arbitrary code execution if successful."}}}}, "created": "2026-04-10T08:38:18.544476+00:00", "updated": "2026-04-10T09:29:01.972791+00:00", "vendors": ["d-link", "d-link$PRODUCT$dir-605l"]}