{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-34254","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2025-04-15T19:15:22.578Z","datePublished":"2025-10-16T18:52:08.435Z","dateUpdated":"2026-05-25T23:41:30.851Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-05-25T23:41:30.851Z"},"title":"D-Link Nuclias Connect <= v1.3.1.4 Login Account Enumeration","descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"D-Link Nuclias Connect firmware versions &lt;= 1.3.1.4 contain an observable response discrepancy vulnerability.&nbsp;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.&nbsp;NOTE: D-Link states that a fix is under development.<br>"}],"value":"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."}],"affected":[{"defaultStatus":"unaffected","modules":["web interface"],"product":"Nuclias Connect","vendor":"D-Link","versions":[{"status":"affected","version":"0","versionType":"custom","lessThanOrEqual":"1.3.1.4"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:dlink:nuclias_connect:*:*:*:*:*:*:*:*","versionEndExcluding":"1.3.1.4","versionStartIncluding":"0","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"OR"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-204","description":"CWE-204 Observable Response Discrepancy","lang":"en","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-575","descriptions":[{"lang":"en","value":"CAPEC-575 Account Footprinting"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"source":{"discovery":"UNKNOWN"},"references":[{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/dlink-nuclias-connect-login-account-enumeration"},{"tags":["product"],"url":"https://www.dlink.com/en/for-business/nuclias/nuclias-connect"},{"tags":["vendor-advisory"],"url":"https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10472"}],"credits":[{"lang":"en","value":"Alex Williams from Pellera Technologies","type":"finder"}],"x_generator":{"engine":"vulncheck"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-10-17T14:29:43.264857Z","id":"CVE-2025-34254","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-10-17T14:29:49.920Z"}}]}}