{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-86509", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "state": "PUBLISHED", "assignerShortName": "VulDB", "dateReserved": "2026-09-07T18:42:22.174Z", "datePublished": "2026-09-08T00:45:14.915Z", "dateUpdated": "2026-09-08T00:45:14.915Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-09-08T00:45:14.915Z"}, "title": "D-Link DIR-895L udhcpcd serverpacket.c sendACK stack-based overflow", "problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-121", "lang": "en", "description": "Stack-based Buffer Overflow"}]}, {"descriptions": [{"type": "CWE", "cweId": "CWE-119", "lang": "en", "description": "Memory Corruption"}]}], "affected": [{"vendor": "D-Link", "product": "DIR-895L", "versions": [{"version": "A1_102b07", "status": "affected"}], "cpes": ["cpe:2.3:h:d-link:dir-895l:*:*:*:*:*:*:*:*"], "modules": ["udhcpcd"]}], "descriptions": [{"lang": "en", "value": "A flaw has been found in D-Link DIR-895L A1_102b07. This impacts the function sendOffer/sendACK of the file udhcpcd/serverpacket.c of the component udhcpcd. This manipulation causes stack-based buffer overflow. The attack can only be done within the local network. The exploit has been published and may be used."}], "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 9.4, "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P", "baseSeverity": "CRITICAL"}}, {"cvssV3_1": {"version": "3.1", "baseScore": 9.6, "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R", "baseSeverity": "CRITICAL"}}, {"cvssV3_0": {"version": "3.0", "baseScore": 9.6, "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R", "baseSeverity": "CRITICAL"}}, {"cvssV2_0": {"version": "2.0", "baseScore": 8.3, "vectorString": "AV:A/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR"}}], "timeline": [{"time": "2026-09-07T00:00:00.000Z", "lang": "en", "value": "Advisory disclosed"}, {"time": "2026-09-07T02:00:00.000Z", "lang": "en", "value": "VulDB entry created"}, {"time": "2026-09-07T20:47:31.000Z", "lang": "en", "value": "VulDB entry last update"}], "credits": [{"lang": "en", "value": "tian (VulDB User)", "type": "reporter"}], "references": [{"url": "https://vuldb.com/vuln/399662", "name": "VDB-399662 | D-Link DIR-895L udhcpcd serverpacket.c sendACK stack-based overflow", "tags": ["vdb-entry", "technical-description"]}, {"url": "https://vuldb.com/vuln/399662/cti", "name": "VDB-399662 | CTI Indicators (IOB, IOC, IOA)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/cve/CVE-2026-86509", "name": "CVE-2026-86509 | CVE Analysis and Report", "tags": ["third-party-advisory"]}, {"url": "https://vuldb.com/submit/906298", "name": "Submit #906298 | D-Link DIR895LA1_102b07 A1_102b07 Stack-based Buffer Overflow", "tags": ["third-party-advisory"]}, {"url": "https://tzh00203.notion.site/D-Link-DIR-895L-Stack-Overflow-in-udhcpd-TR-111-Option-125-Parsing-33cb5c52018a80dc8140e1502e4814d0", "tags": ["exploit"]}, {"url": "https://www.dlink.com/", "tags": ["product"]}], "x_generator": ["VulDB PVTS v202609"]}}}

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{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:h:d-link:dir-895l:*:*:*:*:*:*:*:*"], "modules": ["udhcpcd"], "product": "DIR-895L", "vendor": "D-Link", "versions": [{"status": "affected", "version": "A1_102b07"}]}], "source": "cna@vuldb.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw has been found in D-Link DIR-895L A1_102b07. This impacts the function sendOffer/sendACK of the file udhcpcd/serverpacket.c of the component udhcpcd. This manipulation causes stack-based buffer overflow. The attack can only be done within the local network. The exploit has been published and may be used."}], "id": "CVE-2026-86509", "lastModified": "2026-09-08T01:17:55.947", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "ADJACENT_NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 8.3, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:A/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 6.5, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.6, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 6.0, "source": "cna@vuldb.com", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "ADJACENT", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.6, "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": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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"}]}, "published": "2026-09-08T01:17:55.947", "references": [{"source": "cna@vuldb.com", "url": "https://tzh00203.notion.site/D-Link-DIR-895L-Stack-Overflow-in-udhcpd-TR-111-Option-125-Parsing-33cb5c52018a80dc8140e1502e4814d0"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/cve/CVE-2026-86509"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/submit/906298"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/399662"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/399662/cti"}, {"source": "cna@vuldb.com", "url": "https://www.dlink.com/"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-121"}], "source": "cna@vuldb.com", "type": "Primary"}]}

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