{"id":"CVE-2025-34254","state":"PUBLISHED","title":"D-Link Nuclias Connect <= v1.3.1.4 Login Account Enumeration","description":"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.","publishedAt":"2025-10-16T18:52:08.435Z","updatedAt":"2026-05-25T23:41:30.851Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["D-Link Nuclias Connect"],"affected":[{"vendor":"D-Link","product":"Nuclias Connect","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.3.1.4","versionType":"custom"}],"modules":["web interface"]}],"references":["https://www.vulncheck.com/advisories/dlink-nuclias-connect-login-account-enumeration","https://www.dlink.com/en/for-business/nuclias/nuclias-connect","https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10472"],"weaknesses":["CWE-204"],"ingestedAt":"2026-10-29T20:09:03.054Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/34xxx/CVE-2025-34254.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-34254","state":"PUBLISHED","datePublished":"2025-10-16T18:52:08.435Z","dateUpdated":"2026-05-25T23:41:30.851Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2025-04-15T19:15:22.578Z"},"containers":{"cna":{"title":"D-Link Nuclias Connect <= v1.3.1.4 Login Account Enumeration","descriptions":[{"lang":"en","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":[{"vendor":"D-Link","product":"Nuclias Connect","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.3.1.4","versionType":"custom"}],"modules":["web interface"]}],"references":[{"url":"https://www.vulncheck.com/advisories/dlink-nuclias-connect-login-account-enumeration","tags":["third-party-advisory"]},{"url":"https://www.dlink.com/en/for-business/nuclias/nuclias-connect","tags":["product"]},{"url":"https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10472","tags":["vendor-advisory"]}],"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"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-204","description":"CWE-204 Observable Response Discrepancy","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-05-25T23:41:30.851Z"},"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"}],"impacts":[{"capecId":"CAPEC-575","descriptions":[{"lang":"en","value":"CAPEC-575 Account Footprinting"}]}],"source":{"discovery":"UNKNOWN"},"credits":[{"lang":"en","value":"Alex Williams from Pellera Technologies","type":"finder"}],"x_generator":{"engine":"vulncheck"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-17T14:29:49.920Z"}}]}}}