CVE-2026-5043

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This manipulation of the argument webpage causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way."}, {"lang": "es", "value": "Una debilidad ha sido identificada en Belkin F9K1122 1.00.33. El elemento impactado es la funci\u00f3n formSetPassword del archivo /goform/formSetPassword del componente Gestor de Par\u00e1metros. Esta manipulaci\u00f3n del argumento webpage causa desbordamiento de b\u00fafer basado en pila. La explotaci\u00f3n remota del ataque es posible. El exploit ha sido puesto a disposici\u00f3n del p\u00fablico y podr\u00eda ser usado para ataques. El proveedor fue contactado con antelaci\u00f3n sobre esta divulgaci\u00f3n pero no respondi\u00f3 de ninguna manera."}], "id": "CVE-2026-5043", "lastModified": "2026-06-17T10:58:19.933", "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-2026-5043", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-03-30T15:56:30.350479Z", "version": "2.0.3"}}]}, "published": "2026-03-29T12:15:57.937", "references": [{"source": "cna@vuldb.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/Litengzheng/vul_db/blob/main/Belkin/vul_154/README.md"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/submit/779124"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/vuln/353966"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/vuln/353966/cti"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-121"}], "source": "cna@vuldb.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "1.00.33"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "F9K1122", "source": "cna", "vendor": "Belkin"}, "product": "f9k1122", "vendor": "belkin"}], "analysis": {"en": {"generated_at": "2026-03-30T21:05:53.465199+00:00", "value": {"mitigation_remediation": ["Apply the vendor-supplied firmware update that addresses the formSetPassword buffer overflow.", "If an update is not yet available, block or filter HTTP access to the /goform/formSetPassword endpoint using a firewall or ACL.", "Restrict management access to the router\u2019s web interface to trusted internal IPs only and disable remote administration if not needed.", "Monitor network traffic for unusual POST or GET requests targeting /goform/formSetPassword and investigate any suspicious activity."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The only affected product is the Belkin F9K1122 router running firmware version 1.00.33. No other firmware versions are indicated. The vulnerable component is the Parameter Handler exposed via the router\u2019s web interface.", "description_and_impact": "A stack\u2011based buffer overflow exists in the formSetPassword function of Belkin F9K1122 firmware 1.00.33. The vulnerability allows an attacker to overwrite stack memory through a specially crafted HTTP request to the /goform/formSetPassword endpoint, potentially leading to arbitrary code execution. This flaw directly compromises the confidentiality, integrity, and availability of the device and is classified as a buffer overflow weakness (CWE\u2011119, CWE\u2011121, CWE\u2011787).", "risk_and_exploitability": "The CVSS base score of 8.7 indicates high severity, while the EPSS score of less than 1% suggests low current exploitation activity but publicly available exploit code exists. The flaw is not listed in the CISA KEV catalog. An attacker can remotely exploit the issue by sending crafted requests to the /goform/formSetPassword endpoint, with no local privileges required. Consequently, any network that exposes the router\u2019s web interface to untrusted users faces significant risk."}}}}, "created": "2026-03-29T20:31:39.428638+00:00", "updated": "2026-03-31T20:00:32.396449+00:00", "vendors": ["belkin", "belkin$PRODUCT$f9k1122"]}