CVE-2025-34254
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability—
ProductDlink Nuclias Connect
PublishedOct 16, 2025
First seenOct 16, 2025
Weakness typeCWE-204CWE-204
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| dlink nuclias_connect | v ≤ 1.3.1.4 | — |
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