FKIE_CVE-2025-34254
Vulnerability from fkie_nvd - Published: 2025-10-16 19:15 - Updated: 2026-10-09 10:10
Severity
Summary
D-Link Nuclias Connect firmware versions <= 1.3.1.4 contain an observable response discrepancy vulnerability. The application's 'Login' endpoint returns distinct JSON responses depending on whether the supplied username is associated with an existing account. Because the responses differ in the `error.message`string value, an unauthenticated remote attacker can enumerate valid usernames/accounts on the server. NOTE: D-Link states that a fix is under development.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| dlink | nuclias_connect | * |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"modules": [
"web interface"
],
"product": "Nuclias Connect",
"vendor": "D-Link",
"versions": [
{
"lessThanOrEqual": "1.3.1.4",
"status": "affected",
"version": "0",
"versionType": "custom"
}
]
}
],
"source": "disclosure@vulncheck.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:dlink:nuclias_connect:*:*:*:*:*:*:*:*",
"matchCriteriaId": "1DDE121F-E175-450D-A078-A7BF6F643415",
"versionEndIncluding": "1.3.1.4",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "D-Link Nuclias Connect firmware versions \u003c= 1.3.1.4 contain an observable response discrepancy vulnerability.\u00a0The application\u0027s \u0027Login\u0027 endpoint returns distinct JSON responses depending on whether the supplied username is associated with an existing account. Because the responses differ in the `error.message`string value, an unauthenticated remote attacker can enumerate valid usernames/accounts on the server.\u00a0NOTE: D-Link states that a fix is under development."
},
{
"lang": "es",
"value": "Versiones de firmware de D-Link Nuclias Connect menor o igual que 1.3.1.4 contienen una vulnerabilidad de discrepancia de respuesta observable. El endpoint \u0027Login\u0027 de la aplicaci\u00f3n devuelve respuestas JSON distintas dependiendo de si el nombre de usuario proporcionado est\u00e1 asociado con una cuenta existente. Debido a que las respuestas difieren en el valor de cadena \u0027error.message\u0027, un atacante remoto no autenticado puede enumerar nombres de usuario/cuentas v\u00e1lidos en el servidor. NOTA: D-Link afirma que una soluci\u00f3n est\u00e1 en desarrollo."
}
],
"id": "CVE-2025-34254",
"lastModified": "2026-10-09T10:10:00.193",
"metrics": {
"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": "nvd@nist.gov",
"type": "Primary"
}
],
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "NOT_DEFINED",
"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:X/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": "disclosure@vulncheck.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2025-34254",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-10-17T14:29:43.264857Z",
"version": "2.0.3"
}
}
]
},
"published": "2025-10-16T19:15:32.777",
"references": [
{
"source": "disclosure@vulncheck.com",
"tags": [
"Vendor Advisory"
],
"url": "https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10472"
},
{
"source": "disclosure@vulncheck.com",
"tags": [
"Product"
],
"url": "https://www.dlink.com/en/for-business/nuclias/nuclias-connect"
},
{
"source": "disclosure@vulncheck.com",
"tags": [
"Third Party Advisory"
],
"url": "https://www.vulncheck.com/advisories/dlink-nuclias-connect-login-account-enumeration"
}
],
"sourceIdentifier": "disclosure@vulncheck.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-204"
}
],
"source": "disclosure@vulncheck.com",
"type": "Secondary"
}
]
}
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