D-Link Nuclias Connect up to 1.3.1.4 error.message response discrepancy

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in D-Link Nuclias Connect up to 1.3.1.4. This vulnerability affects unknown code. The manipulation of the argument error.message leads to response discrepancy. This vulnerability is traded as CVE-2025-34254. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in D-Link Nuclias Connect up to 1.3.1.4. It has been rated as problematic. This issue affects some unknown processing. The manipulation of the argument error.message with an unknown input leads to a response discrepancy vulnerability. Using CWE to declare the problem leads to CWE-204. The product provides different responses to incoming requests in a way that reveals internal state information to an unauthorized actor outside of the intended control sphere. Impacted is confidentiality. The summary by CVE is:

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.

The weakness was shared by Alex Williams. It is possible to read the advisory at vulncheck.com. The identification of this vulnerability is CVE-2025-34254 since 04/15/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/31/2025). The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

Upgrading to version 1.3.1.4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-34831). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.3
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Response discrepancy
CWE: CWE-204 / CWE-203 / CWE-200
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Nuclias Connect 1.3.1.4

Timelineinfo

04/15/2025 CVE reserved
10/16/2025 +184 days Advisory disclosed
10/16/2025 +0 days VulDB entry created
10/31/2025 +15 days VulDB entry last update

Sourcesinfo

Vendor: dlink.com

Advisory: vulncheck.com
Researcher: Alex Williams
Status: Confirmed

CVE: CVE-2025-34254 (🔒)
GCVE (CVE): GCVE-0-2025-34254
GCVE (VulDB): GCVE-100-328859
EUVD: 🔒

Entryinfo

Created: 10/16/2025 21:54
Updated: 10/31/2025 07:02
Changes: 10/16/2025 21:54 (67), 10/17/2025 05:53 (1), 10/31/2025 07:02 (10)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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