Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 37.4%
CVSS Severity
CVSS v3 Score 5.3
References
Products affected by CVE-2025-34254
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cpe:2.3:a:dlink:nuclias_connect:*