CVE-2025-34254 - CVE House
Back to Database
Status published Medium CVE-2025-34254

D-Link Nuclias Connect <= v1.3.1.4 Login Account Enumeration

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2025-34254

Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Alex Williams from Pellera Technologies

References

More from D-Link

View All →
CVE-2025-9938
D-Link DI-8400 yyxz.asp yyxz_dlink_asp stack-based overflow
High 8.7
CVE-2025-9769
D-Link DI-7400G+ mng_platform.asp sub_478D28 command injection
Low 2.4
CVE-2025-9752
D-Link DIR-852 SOAP Service soap.cgi soapcgi_main os command injection
Medium 6.9
CVE-2025-9745
D-Link DI-500WF jhttpd version_upgrade.asp os command injection
Medium 5.1
CVE-2025-9727
D-Link DIR-816L soap.cgi soapcgi_main os command injection
Medium 5.3

Affected Vendor

Affected Software

Nuclias Connect
Vulnerable Versions:
0

Timeline

Official Publish: October 16th, 2025
Last Modified: May 25th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-204

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.