VulnerabilityAnalyzed

CVE-2025-34254

D-Link Nuclias Connect firmware versions <= 1.3.1.4 contain an observable response discrepancy vulnerability.

MEDIUM 6.9EPSS 0.95%

Does this matter?

Lower severity and a low EPSS score (0.95%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 4.0: 6.9 MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.95% probability · 59th percentile
CISA KEV: Not listed
Weakness: CWE-204
Affected: dlink/nuclias connect
Source: disclosure@vulncheck.com

References

https://supportannouncement.us.dlink.com/security/publication.aspx?name=SAP10472Vendor Advisory
https://www.dlink.com/en/for-business/nuclias/nuclias-connectProduct
https://www.vulncheck.com/advisories/dlink-nuclias-connect-login-account-enumerationThird Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.