D-Link Nuclias Connect firmware versions <= 1.3.1.4 contain an observable response discrepancy vulnerability. The application's 'Forgot Password' endpoint returns distinct JSON responses depending on whether the supplied email address is associated with an existing account. Because the responses differ in the `data.exist` boolean value, an unauthenticated remote attacker can enumerate valid email addresses/accounts on the server. NOTE: D-Link states that a fix is under development.
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Fixes

Solution

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Workaround

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History

Fri, 31 Oct 2025 01:15:00 +0900

Type Values Removed Values Added
First Time appeared Dlink
Dlink nuclias Connect
CPEs cpe:2.3:a:dlink:nuclias_connect:*:*:*:*:*:*:*:*
Vendors & Products Dlink
Dlink nuclias Connect
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}


Mon, 20 Oct 2025 22:30:00 +0900

Type Values Removed Values Added
First Time appeared D-link
D-link nuclias Connect
Vendors & Products D-link
D-link nuclias Connect

Sat, 18 Oct 2025 00:15:00 +0900

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 17 Oct 2025 04:00:00 +0900

Type Values Removed Values Added
Description D-Link Nuclias Connect firmware versions <= 1.3.1.4 contain an observable response discrepancy vulnerability. The application's 'Forgot Password' endpoint returns distinct JSON responses depending on whether the supplied email address is associated with an existing account. Because the responses differ in the `data.exist` boolean value, an unauthenticated remote attacker can enumerate valid email addresses/accounts on the server. NOTE: D-Link states that a fix is under development.
Title D-Link Nuclias Connect <= v1.3.1.4 Forgot Password Account Enumeration
Weaknesses CWE-204
References
Metrics cvssV4_0

{'score': 6.9, '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2025-11-28T19:27:36.876Z

Reserved: 2025-04-15T19:15:22.578Z

Link: CVE-2025-34255

cve-icon Vulnrichment

Updated: 2025-10-17T14:29:14.522Z

cve-icon NVD

Status : Analyzed

Published: 2025-10-16T19:15:32.920

Modified: 2025-10-30T16:06:51.820

Link: CVE-2025-34255

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-10-20T22:24:54Z

Weaknesses