CVE-2026-4181

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-4181", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "state": "PUBLISHED", "assignerShortName": "VulDB", "dateReserved": "2026-03-14T21:56:59.156Z", "datePublished": "2026-03-15T16:02:10.609Z", "dateUpdated": "2026-03-16T14:40:33.964Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-03-15T16:02:10.609Z"}, "title": "D-Link DIR-816 goahead form2RepeaterStep2.cgi 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-816", "versions": [{"version": "1.10CNB05", "status": "affected"}], "modules": ["goahead"]}], "descriptions": [{"lang": "en", "value": "A security flaw has been discovered in D-Link DIR-816 1.10CNB05. This affects an unknown function of the file /goform/form2RepeaterStep2.cgi of the component goahead. The manipulation of the argument key1/key2/key3/key4/pskValue results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. This vulnerability only affects products that are no longer supported by the maintainer."}], "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 9.3, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P", "baseSeverity": "CRITICAL"}}, {"cvssV3_1": {"version": "3.1", "baseScore": 9.8, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R", "baseSeverity": "CRITICAL"}}, {"cvssV3_0": {"version": "3.0", "baseScore": 9.8, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R", "baseSeverity": "CRITICAL"}}, {"cvssV2_0": {"version": "2.0", "baseScore": 10, "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR"}}], "timeline": [{"time": "2026-03-14T00:00:00.000Z", "lang": "en", "value": "Advisory disclosed"}, {"time": "2026-03-14T01:00:00.000Z", "lang": "en", "value": "VulDB entry created"}, {"time": "2026-03-14T23:02:15.000Z", "lang": "en", "value": "VulDB entry last update"}], "credits": [{"lang": "en", "value": "pjqwudi (VulDB User)", "type": "reporter"}], "references": [{"url": "https://vuldb.com/?id.351085", "name": "VDB-351085 | D-Link DIR-816 goahead form2RepeaterStep2.cgi stack-based overflow", "tags": ["vdb-entry", "technical-description"]}, {"url": "https://vuldb.com/?ctiid.351085", "name": "VDB-351085 | CTI Indicators (IOB, IOC, IOA)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/?submit.769829", "name": "Submit #769829 | D-Link DIR816 1.10CNB05 Stack-based Buffer Overflow", "tags": ["third-party-advisory"]}, {"url": "https://github.com/wudipjq/my_vuln/blob/main/D-Link7/vuln_85/85.md", "tags": ["exploit"]}, {"url": "https://www.dlink.com/", "tags": ["product"]}], "tags": ["unsupported-when-assigned"]}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-4181", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-16T14:35:21.480347Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-16T14:40:33.964Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-4181", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-03-16T14:35:21.480347Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-16T14:36:36.640Z"}}], "cna": {"tags": ["unsupported-when-assigned"], "title": "D-Link DIR-816 goahead form2RepeaterStep2.cgi stack-based overflow", "credits": [{"lang": "en", "type": "reporter", "value": "pjqwudi (VulDB User)"}], "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 9.3, "baseSeverity": "CRITICAL", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P"}}, {"cvssV3_1": {"version": "3.1", "baseScore": 9.8, "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R"}}, {"cvssV3_0": {"version": "3.0", "baseScore": 9.8, "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R"}}, {"cvssV2_0": {"version": "2.0", "baseScore": 10, "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C/E:POC/RL:ND/RC:UR"}}], "affected": [{"vendor": "D-Link", "modules": ["goahead"], "product": "DIR-816", "versions": [{"status": "affected", "version": "1.10CNB05"}]}], "timeline": [{"lang": "en", "time": "2026-03-14T00:00:00.000Z", "value": "Advisory disclosed"}, {"lang": "en", "time": "2026-03-14T01:00:00.000Z", "value": "VulDB entry created"}, {"lang": "en", "time": "2026-03-14T23:02:15.000Z", "value": "VulDB entry last update"}], "references": [{"url": "https://vuldb.com/?id.351085", "name": "VDB-351085 | D-Link DIR-816 goahead form2RepeaterStep2.cgi stack-based overflow", "tags": ["vdb-entry", "technical-description"]}, {"url": "https://vuldb.com/?ctiid.351085", "name": "VDB-351085 | CTI Indicators (IOB, IOC, IOA)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/?submit.769829", "name": "Submit #769829 | D-Link DIR816 1.10CNB05 Stack-based Buffer Overflow", "tags": ["third-party-advisory"]}, {"url": "https://github.com/wudipjq/my_vuln/blob/main/D-Link7/vuln_85/85.md", "tags": ["exploit"]}, {"url": "https://www.dlink.com/", "tags": ["product"]}], "descriptions": [{"lang": "en", "value": "A security flaw has been discovered in D-Link DIR-816 1.10CNB05. This affects an unknown function of the file /goform/form2RepeaterStep2.cgi of the component goahead. The manipulation of the argument key1/key2/key3/key4/pskValue results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. This vulnerability only affects products that are no longer supported by the maintainer."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-121", "description": "Stack-based Buffer Overflow"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-119", "description": "Memory Corruption"}]}], "providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-03-15T16:02:10.609Z"}}}, "cveMetadata": {"cveId": "CVE-2026-4181", "state": "PUBLISHED", "dateUpdated": "2026-03-16T14:40:33.964Z", "dateReserved": "2026-03-14T21:56:59.156Z", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "datePublished": "2026-03-15T16:02:10.609Z", "assignerShortName": "VulDB"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"modules": ["goahead"], "product": "DIR-816", "vendor": "D-Link", "versions": [{"status": "affected", "version": "1.10CNB05"}]}], "source": "cna@vuldb.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:dlink:dir-816_firmware:1.10cnb05:*:*:*:*:*:*:*", "matchCriteriaId": "6A221E99-E2B0-4C57-9263-9A86EFF8746E", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:dlink:dir-816:-:*:*:*:*:*:*:*", "matchCriteriaId": "B54058C1-B58F-434A-ABF0-A6B314A1AB14", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [{"sourceIdentifier": "cna@vuldb.com", "tags": ["unsupported-when-assigned"]}], "descriptions": [{"lang": "en", "value": "A security flaw has been discovered in D-Link DIR-816 1.10CNB05. This affects an unknown function of the file /goform/form2RepeaterStep2.cgi of the component goahead. The manipulation of the argument key1/key2/key3/key4/pskValue results in stack-based buffer overflow. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. This vulnerability only affects products that are no longer supported by the maintainer."}, {"lang": "es", "value": "Una falla de seguridad ha sido descubierta en D-Link DIR-816 1.10CNB05. Esto afecta una funci\u00f3n desconocida del archivo /goform/form2RepeaterStep2.cgi del componente goahead. La manipulaci\u00f3n del argumento key1/key2/key3/key4/pskValue resulta en desbordamiento de b\u00fafer basado en pila. El ataque puede ser lanzado remotamente. El exploit ha sido liberado al p\u00fablico y puede ser usado para ataques. Esta vulnerabilidad solo afecta productos que ya no son compatibles por el mantenedor."}], "id": "CVE-2026-4181", "lastModified": "2026-06-17T10:56:07.730", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 10.0, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "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": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "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": 8.9, "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": "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: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-2026-4181", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-16T14:35:21.480347Z", "version": "2.0.3"}}]}, "published": "2026-03-16T14:19:58.797", "references": [{"source": "cna@vuldb.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/wudipjq/my_vuln/blob/main/D-Link7/vuln_85/85.md"}, {"source": "cna@vuldb.com", "tags": ["Permissions Required", "VDB Entry"], "url": "https://vuldb.com/?ctiid.351085"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?id.351085"}, {"source": "cna@vuldb.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "https://vuldb.com/?submit.769829"}, {"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-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": "generic", "value": "1.10CNB05"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "DIR-816", "source": "cna", "vendor": "D-Link"}, "product": "dir-816", "vendor": "d-link"}], "analysis": {"en": {"generated_at": "2026-03-19T21:26:27.848855+00:00", "value": {"mitigation_remediation": ["Apply the latest firmware update from D\u2011Link for the DIR\u2011816 (if available).", "If no update is available, consider upgrading to a supported router model or a different manufacturer.", "Restrict external access to the router\u2019s administrative interfaces by configuring firewall rules or ACLs.", "Monitor network traffic for suspicious requests to /goform/form2RepeaterStep2.cgi.", "Isolate the device from critical networks until a patch or mitigation is applied."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "Key detail from CVE description: only the D\u2011Link DIR\u2011816 model running firmware version 1.10CNB05 is affected. No other firmware versions or models are mentioned, and the vulnerability is stated to impact products that are no longer supported by the manufacturer.", "description_and_impact": "Key detail from CVE description: a stack-based buffer overflow can be triggered by manipulating the arguments key1/key2/key3/key4/pskValue in the /goform/form2RepeaterStep2.cgi servlet of D\u2011Link DIR\u2011816 firmware 1.10CNB05. The control\u2011flow corruption allows an attacker to execute arbitrary code on the router, compromising confidentiality, integrity, and availability of the device and potentially the network it serves.", "risk_and_exploitability": "The CVSS score of 9.3 indicates a critical severity level, and the EPSS score of <1% suggests low current exploit probability. The vulnerability is not listed in the KEV catalog. It is inferred that exploitation requires remote access to the router\u2019s administrative interface over the network, targeting the form2RepeaterStep2.cgi endpoint. The public release of an exploit amplifies the risk if the device is still under network exposure."}}}}, "created": "2026-03-16T09:21:32.308638+00:00", "updated": "2026-03-23T14:01:39.639827+00:00", "vendors": ["d-link", "d-link$PRODUCT$dir-816"]}