PT-2025-42528 · D Link · D-Link Nuclias Connect

Alex Williams · Published 2025-10-16 · Updated 2025-10-16 · CVE-2025-34254

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions D-Link Nuclias Connect versions 1.3.1.4 and earlier

Description The application’s 'Login' endpoint, /Login, exhibits an observable response discrepancy. The endpoint returns different JSON responses based on whether the provided username is linked to an existing account. These differing responses, specifically in the error.message string, allow a remote attacker to enumerate valid usernames and accounts on the server without authentication.

Recommendations Versions prior to 1.3.1.4 are affected. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Weakness Enumeration

CWE-204

Related Identifiers

BDU:2025-13177

CVE-2025-34254

Affected Products

D-Link Nuclias Connect

References · 9

• https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10472 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-34254 · Security Note
• https://bdu.fstec.ru/vul/2025-13177 · Security Note
• https://osv.dev/vulnerability/CVE-2025-34254 · Vendor Advisory
• https://twitter.com/VulmonFeeds/status/1978969471919280429 · Twitter Post
• https://dlink.com/en/for-business/nuclias/nuclias-connect · Note
• https://twitter.com/CVEnew/status/1978926549740007797 · Twitter Post
• https://t.me/CVEtracker/35141 · Telegram Post
• https://vulncheck.com/advisories/dlink-nuclias-connect-login-account-enumeration · Note