CVE-2026-9399 (GCVE-0-2026-9399)
Vulnerability from cvelistv5 – Published: 2026-05-24 21:00 – Updated: 2026-05-26 16:11
VLAI
EPSS
VEX
Title
Edimax BR-6675nD POST Request formsetPPPoE buffer overflow
Summary
A vulnerability was detected in Edimax BR-6675nD 1.12. This vulnerability affects the function formsetPPPoE of the file /goform/formsetPPPoE of the component POST Request Handler. Performing a manipulation of the argument pppUserName results in buffer overflow. It is possible to initiate the attack remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-26 16:10 UTC
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/365380 | vdb-entrytechnical-description |
| https://vuldb.com/vuln/365380/cti | signaturepermissions-required |
| https://vuldb.com/submit/811561 | third-party-advisory |
| https://lavender-bicycle-a5a.notion.site/EDIMAX-B… | exploit |
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-9399",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-26T16:10:59.684983Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-05-26T16:11:08.771Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:edimax:br-6675nd:*:*:*:*:*:*:*:*"
],
"modules": [
"POST Request Handler"
],
"product": "BR-6675nD",
"vendor": "Edimax",
"versions": [
{
"status": "affected",
"version": "1.12"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "yhryhryhr_tu (VulDB User)"
},
{
"lang": "en",
"type": "coordinator",
"value": "VulDB CNA Team"
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability was detected in Edimax BR-6675nD 1.12. This vulnerability affects the function formsetPPPoE of the file /goform/formsetPPPoE of the component POST Request Handler. Performing a manipulation of the argument pppUserName results in buffer overflow. It is possible to initiate the attack remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 8.7,
"baseSeverity": "HIGH",
"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",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 8.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 8.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 9,
"vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-120",
"description": "Buffer Overflow",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-119",
"description": "Memory Corruption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-24T21:00:13.650Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-365380 | Edimax BR-6675nD POST Request formsetPPPoE buffer overflow",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/vuln/365380"
},
{
"name": "VDB-365380 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/vuln/365380/cti"
},
{
"name": "Submit #811561 | EDIMAX BR-6675nD BR-6675nD v1.12 Buffer Overflow",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/submit/811561"
},
{
"tags": [
"exploit"
],
"url": "https://lavender-bicycle-a5a.notion.site/EDIMAX-BR-6675nD-formsetPPPoE-34b53a41781f8025abcded9e7d0734ef?source=copy_link"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-05-24T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-05-24T02:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-05-24T08:29:25.000Z",
"value": "VulDB entry last update"
}
],
"title": "Edimax BR-6675nD POST Request formsetPPPoE buffer overflow"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-9399",
"datePublished": "2026-05-24T21:00:13.650Z",
"dateReserved": "2026-05-24T06:24:09.601Z",
"dateUpdated": "2026-05-26T16:11:08.771Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-9399",
"date": "2026-08-23",
"epss": "0.00445",
"percentile": "0.3725"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-9399\",\"sourceIdentifier\":\"cna@vuldb.com\",\"published\":\"2026-05-24T22:16:16.200\",\"lastModified\":\"2026-07-23T11:10:00.120\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability was detected in Edimax BR-6675nD 1.12. This vulnerability affects the function formsetPPPoE of the file /goform/formsetPPPoE of the component POST Request Handler. Performing a manipulation of the argument pppUserName results in buffer overflow. It is possible to initiate the attack remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.\"},{\"lang\":\"es\",\"value\":\"Una vulnerabilidad fue detectada en Edimax BR-6675nD 1.12. Esta vulnerabilidad afecta a la funci\u00f3n formsetPPPoE del archivo /goform/formsetPPPoE del componente Gestor de Solicitudes POST. Realizar una manipulaci\u00f3n del argumento pppUserName resulta en desbordamiento de b\u00fafer. Es posible iniciar el ataque de forma remota. El exploit es ahora p\u00fablico y puede ser usado. El proveedor fue contactado con antelaci\u00f3n sobre esta divulgaci\u00f3n, pero no respondi\u00f3 de ninguna manera.\"}],\"affected\":[{\"source\":\"cna@vuldb.com\",\"affectedData\":[{\"vendor\":\"Edimax\",\"product\":\"BR-6675nD\",\"cpes\":[\"cpe:2.3:a:edimax:br-6675nd:*:*:*:*:*:*:*:*\"],\"modules\":[\"POST Request Handler\"],\"versions\":[{\"version\":\"1.12\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"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\",\"baseScore\":7.4,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"HIGH\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"PROOF_OF_CONCEPT\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:N/AC:L/Au:S/C:C/I:C/A:C\",\"baseScore\":9.0,\"accessVector\":\"NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"SINGLE\",\"confidentialityImpact\":\"COMPLETE\",\"integrityImpact\":\"COMPLETE\",\"availabilityImpact\":\"COMPLETE\"},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":8.0,\"impactScore\":10.0,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-05-26T16:10:59.684983Z\",\"id\":\"CVE-2026-9399\",\"options\":[{\"exploitation\":\"poc\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"cna@vuldb.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-119\"},{\"lang\":\"en\",\"value\":\"CWE-120\"}]}],\"references\":[{\"url\":\"https://lavender-bicycle-a5a.notion.site/EDIMAX-BR-6675nD-formsetPPPoE-34b53a41781f8025abcded9e7d0734ef?source=copy_link\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/submit/811561\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/vuln/365380\",\"source\":\"cna@vuldb.com\"},{\"url\":\"https://vuldb.com/vuln/365380/cti\",\"source\":\"cna@vuldb.com\"}]}}",
"redhat_vex": {
"current_release_date": "2026-05-26T20:14:13+00:00",
"cve": "CVE-2026-9399",
"id": "CVE-2026-9399",
"initial_release_date": "2026-01-01T00:00:00+00:00",
"product_status:known_not_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "Edimax BR-6675nD POST Request formsetPPPoE buffer overflow",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9399.json",
"version": "3"
},
"vulnrichment": {
"containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"shortName\": \"VulDB\", \"dateUpdated\": \"2026-05-24T21:00:13.650Z\"}, \"title\": \"Edimax BR-6675nD POST Request formsetPPPoE buffer overflow\", \"problemTypes\": [{\"descriptions\": [{\"type\": \"CWE\", \"cweId\": \"CWE-120\", \"lang\": \"en\", \"description\": \"Buffer Overflow\"}]}, {\"descriptions\": [{\"type\": \"CWE\", \"cweId\": \"CWE-119\", \"lang\": \"en\", \"description\": \"Memory Corruption\"}]}], \"affected\": [{\"vendor\": \"Edimax\", \"product\": \"BR-6675nD\", \"versions\": [{\"version\": \"1.12\", \"status\": \"affected\"}], \"cpes\": [\"cpe:2.3:a:edimax:br-6675nd:*:*:*:*:*:*:*:*\"], \"modules\": [\"POST Request Handler\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"A vulnerability was detected in Edimax BR-6675nD 1.12. This vulnerability affects the function formsetPPPoE of the file /goform/formsetPPPoE of the component POST Request Handler. Performing a manipulation of the argument pppUserName results in buffer overflow. It is possible to initiate the attack remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.\"}], \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 8.7, \"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\", \"baseSeverity\": \"HIGH\"}}, {\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 8.8, \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R\", \"baseSeverity\": \"HIGH\"}}, {\"cvssV3_0\": {\"version\": \"3.0\", \"baseScore\": 8.8, \"vectorString\": \"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R\", \"baseSeverity\": \"HIGH\"}}, {\"cvssV2_0\": {\"version\": \"2.0\", \"baseScore\": 9, \"vectorString\": \"AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR\"}}], \"timeline\": [{\"time\": \"2026-05-24T00:00:00.000Z\", \"lang\": \"en\", \"value\": \"Advisory disclosed\"}, {\"time\": \"2026-05-24T02:00:00.000Z\", \"lang\": \"en\", \"value\": \"VulDB entry created\"}, {\"time\": \"2026-05-24T08:29:25.000Z\", \"lang\": \"en\", \"value\": \"VulDB entry last update\"}], \"credits\": [{\"lang\": \"en\", \"value\": \"yhryhryhr_tu (VulDB User)\", \"type\": \"reporter\"}, {\"lang\": \"en\", \"value\": \"VulDB CNA Team\", \"type\": \"coordinator\"}], \"references\": [{\"url\": \"https://vuldb.com/vuln/365380\", \"name\": \"VDB-365380 | Edimax BR-6675nD POST Request formsetPPPoE buffer overflow\", \"tags\": [\"vdb-entry\", \"technical-description\"]}, {\"url\": \"https://vuldb.com/vuln/365380/cti\", \"name\": \"VDB-365380 | CTI Indicators (IOB, IOC, IOA)\", \"tags\": [\"signature\", \"permissions-required\"]}, {\"url\": \"https://vuldb.com/submit/811561\", \"name\": \"Submit #811561 | EDIMAX BR-6675nD BR-6675nD v1.12 Buffer Overflow\", \"tags\": [\"third-party-advisory\"]}, {\"url\": \"https://lavender-bicycle-a5a.notion.site/EDIMAX-BR-6675nD-formsetPPPoE-34b53a41781f8025abcded9e7d0734ef?source=copy_link\", \"tags\": [\"exploit\"]}]}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-9399\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-26T16:10:59.684983Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-26T16:11:05.427Z\"}}]}",
"cveMetadata": "{\"cveId\": \"CVE-2026-9399\", \"assignerOrgId\": \"1af790b2-7ee1-4545-860a-a788eba489b5\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"VulDB\", \"dateReserved\": \"2026-05-24T06:24:09.601Z\", \"datePublished\": \"2026-05-24T21:00:13.650Z\", \"dateUpdated\": \"2026-05-26T16:11:08.771Z\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Loading…
Loading…