CVE-2025-34254

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.

CVSS

No CVSS.

References

Link	Resource
https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10472
https://www.dlink.com/en/for-business/nuclias/nuclias-connect
https://www.vulncheck.com/advisories/dlink-nuclias-connect-login-account-enumeration

Configurations

No configuration.

History

16 Oct 2025, 19:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-10-16 19:15

Updated : 2025-10-21 19:31

NVD link : CVE-2025-34254

Mitre link : CVE-2025-34254

CVE.ORG link : CVE-2025-34254

JSON object : View

Products Affected

No product.

CWE

CWE-204

Observable Response Discrepancy

{"id": "CVE-2025-34254", "cveTags": [], "metrics": {"cvssMetricV40": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.9, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2025-10-16T19:15:32.777", "references": [{"url": "https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10472", "source": "disclosure@vulncheck.com"}, {"url": "https://www.dlink.com/en/for-business/nuclias/nuclias-connect", "source": "disclosure@vulncheck.com"}, {"url": "https://www.vulncheck.com/advisories/dlink-nuclias-connect-login-account-enumeration", "source": "disclosure@vulncheck.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "description": [{"lang": "en", "value": "CWE-204"}]}], "descriptions": [{"lang": "en", "value": "D-Link Nuclias Connect firmware versions <= 1.3.1.4 contain an observable response discrepancy vulnerability.\u00a0The 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.\u00a0NOTE: D-Link states that a fix is under development."}], "lastModified": "2025-10-21T19:31:50.020", "sourceIdentifier": "disclosure@vulncheck.com"}