Unrated severityNVD Advisory· Published Oct 16, 2025· Updated Mar 23, 2026
D-Link Nuclias Connect <= v1.3.1.4 Login Account Enumeration
CVE-2025-34254
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.messagestring value, an unauthenticated remote attacker can enumerate valid usernames/accounts on the server. NOTE: D-Link states that a fix is under development.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
2<=1.3.1.4+ 1 more
- (no CPE)range: <=1.3.1.4
- (no CPE)range: *
Patches
Vulnerability mechanics
References
3- supportannouncement.us.dlink.com/security/publication.aspxmitrevendor-advisory
- www.vulncheck.com/advisories/dlink-nuclias-connect-login-account-enumerationmitrethird-party-advisory
- www.dlink.com/en/for-business/nuclias/nuclias-connectmitreproduct
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