CVE-2026-5311

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Affected is the function Webdav_Access_List of the file /cgi-bin/file_center.cgi. Performing a manipulation of the argument cmd results in improper access controls. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks."}, {"lang": "es", "value": "Se ha descubierto una falla de seguridad en D-Link DNS-120, DNR-202L, DNS-315L, DNS-320, DNS-320L, DNS-320LW, DNS-321, DNR-322L, DNS-323, DNS-325, DNS-326, DNS-327L, DNR-326, DNS-340L, DNS-343, DNS-345, DNS-726-4, DNS-1100-4, DNS-1200-05 y DNS-1550-04 hasta 20260205. La funci\u00f3n afectada es Webdav_Access_List del archivo /cgi-bin/file_center.cgi. Al realizar una manipulaci\u00f3n del argumento cmd, se producen controles de acceso inadecuados. Es posible iniciar el ataque de forma remota. El exploit ha sido liberado al p\u00fablico y puede ser utilizado para ataques."}], "id": "CVE-2026-5311", "lastModified": "2026-10-26T21:10:00.170", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "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": 5.5, "baseSeverity": "MEDIUM", "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": "NONE", "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:N/UI:N/VC:L/VI:N/VA:N/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": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5311", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-02T15:26:11.181157Z", "version": "2.0.3"}}]}, "published": "2026-04-01T20:16:29.950", "references": [{"source": "cna@vuldb.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/wudipjq/my_vuln/blob/main/D-Link8/vuln_171/171.md"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/submit/780441"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/vuln/354640"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/vuln/354640/cti"}, {"source": "cna@vuldb.com", "tags": ["Product"], "url": "https://www.dlink.com/"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-266"}, {"lang": "en", "value": "CWE-284"}], "source": "cna@vuldb.com", "type": "Secondary"}]}

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"matching"}]}, "original": {"product": "DNS-340L", "source": "cna", "vendor": "D-Link"}, "product": "dns-340l", "vendor": "d-link"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "20260205"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "DNS-343", "source": "cna", "vendor": "D-Link"}, "product": "dns-343", "vendor": "d-link"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "20260205"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "DNS-345", "source": "cna", "vendor": "D-Link"}, "product": "dns-345", "vendor": "d-link"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "20260205"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "DNS-726-4", "source": "cna", "vendor": "D-Link"}, "product": "dns-726-4", "vendor": "d-link"}], "analysis": {"en": {"generated_at": "2026-04-08T00:00:03.546788+00:00", "value": {"mitigation_remediation": ["Install the latest firmware update from D\u2011Link that addresses the WebDAV access list flaw. ", "If an update has not yet been released, disable the WebDAV service or restrict it to trusted IP ranges. ", "Monitor device logs for abnormal file operations and block any unauthorized commands. ", "Consider network segmentation to limit the exposure of vulnerable devices."], "summary": {"action": "Seek Update", "impact": "Unauthorized WebDAV File Access"}, "threat_synthesis": {"affected_systems": "D-Link routers and gateways\u2014including the DNR\u2011202L, DNR\u2011322L, DNR\u2011326, DNS\u20111100\u20114, DNS\u2011120, DNS\u20111200\u201105, DNS\u20111550\u201104, DNS\u2011315L, DNS\u2011320, DNS\u2011320L, DNS\u2011320LW, DNS\u2011321, DNS\u2011322L, DNS\u2011323, DNS\u2011325, DNS\u2011326, DNS\u2011327L, DNS\u2011340L, DNS\u2011343, DNS\u2011345, and DNS\u2011726\u20114\u2014are affected for firmware versions up through 20260205.", "description_and_impact": "A flaw in the WebDAV Access List function of file_center.cgi lets attackers manipulate the cmd parameter to bypass the router\u2019s authentication controls. This improper access control permits unauthorized reading or writing of files stored on the device, potentially exposing configuration data or enabling further compromise. The weakness aligns with CWE\u2011266 and CWE\u2011284 regarding credential management and improper authorization.", "risk_and_exploitability": "The CVSS score is 6.9, indicating a medium severity, while the EPSS score is below 1\u202f%, suggesting that exploitation is relatively uncommon. The flaw is not listed in CISA\u2019s KEV catalog, yet published exploit code has been released to the public. Attackers can reach the vulnerable function remotely over WebDAV, manipulate the cmd argument, and gain unauthorized file access. The lack of an official patch is noted, so current risk remains medium; however, the low EPSS indicates exploitation is unlikely unless a new exploit version is developed."}}}}, "created": "2026-04-02T07:47:59.952190+00:00", "updated": "2026-04-08T19:56:59.830920+00:00", "vendors": ["d-link", "d-link$PRODUCT$dnr-202l", "d-link$PRODUCT$dnr-322l", "d-link$PRODUCT$dnr-326", "d-link$PRODUCT$dns-1100-4", "d-link$PRODUCT$dns-120", "d-link$PRODUCT$dns-1200-05", "d-link$PRODUCT$dns-1550-04", "d-link$PRODUCT$dns-315l", "d-link$PRODUCT$dns-320", "d-link$PRODUCT$dns-320l", "d-link$PRODUCT$dns-320lw", "d-link$PRODUCT$dns-321", "d-link$PRODUCT$dns-323", "d-link$PRODUCT$dns-325", "d-link$PRODUCT$dns-326", "d-link$PRODUCT$dns-327l", "d-link$PRODUCT$dns-340l", "d-link$PRODUCT$dns-343", "d-link$PRODUCT$dns-345", "d-link$PRODUCT$dns-726-4"]}