CVE-2026-5611

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The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way."}, {"lang": "es", "value": "Una vulnerabilidad fue encontrada en Belkin F9K1015 1.00.10. Esto afecta la funci\u00f3n formCrossBandSwitch del archivo /goform/formCrossBandSwitch. Realizar una manipulaci\u00f3n del argumento webpage resulta en desbordamiento de b\u00fafer basado en pila. El ataque puede ser iniciado remotamente. El exploit ha sido hecho p\u00fablico y podr\u00eda ser usado. El proveedor fue contactado tempranamente sobre esta divulgaci\u00f3n pero no respondi\u00f3 de ninguna manera."}], "id": "CVE-2026-5611", "lastModified": "2026-07-24T20:10:00.147", "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-2026-5611", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-07T02:58:23.395786Z", "version": "2.0.3"}}]}, "published": "2026-04-06T03:16:07.570", "references": [{"source": "cna@vuldb.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/Litengzheng/vuldb_new/blob/main/Belkin%20F9K1015/vul_5/README.md"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/submit/785538"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/vuln/355402"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/vuln/355402/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"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "1.00.10"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "F9K1015", "source": "cna", "vendor": "Belkin"}, "product": "f9k1015", "vendor": "belkin"}], "analysis": {"en": {"generated_at": "2026-04-06T05:50:36.025762+00:00", "value": {"mitigation_remediation": ["Check the Belkin website or device management portal for a firmware update that addresses this issue and install it immediately.", "If an update is not yet available, limit exposure by disabling the /goform interface or restricting HTTP/HTTPS access to trusted IP addresses via the device\u2019s firewall settings.", "Block inbound traffic on the affected ports (80/443) from untrusted networks using network perimeter controls.", "Monitor device logs for irregular formCrossBandSwitch requests and investigate any anomalies promptly."], "summary": {"action": "Patch ASAP", "impact": "Remote Code Execution via stack\u2011based buffer overflow"}, "threat_synthesis": {"affected_systems": "Belkin F9K1015 devices running firmware 1.00.10 are affected. The flaw resides in the web interface, specifically the formCrossBandSwitch functionality, and is limited to this firmware release. No other firmware versions or models are listed as impacted.", "description_and_impact": "A stack\u2011based buffer overflow exists in the formCrossBandSwitch handler of Belkin F9K1015 firmware 1.00.10. Manipulating the \"webpage\" argument sent to the /goform/formCrossBandSwitch endpoint causes the overflow, which can corrupt the stack and enable arbitrary code execution or a denial of service. The vulnerability is reportable as a remote exploitation vector, meaning an attacker only needs network reachability to the device to trigger it, and public exploits have already been released.", "risk_and_exploitability": "The CVSS base score of 8.7 assigns a high severity, reflecting significant confidentiality, integrity, and availability damage potential. The publicly available exploit and lack of vendor response reduce the time window for remediation. Although there is no EPSS score or KEV listing, the remote nature of the attack coupled with the stack overflow weakness (CWE\u2011119 and CWE\u2011121) makes this vulnerability likely to be actively exploited by skilled adversaries."}}}}, "created": "2026-04-06T20:21:45.356528+00:00", "updated": "2026-04-06T21:47:35.581304+00:00", "vendors": ["belkin", "belkin$PRODUCT$f9k1015"]}