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CVE-2025-56764

MediumPublished

Trivision NC-227WF firmware 5.80 (build 20141010) login mechanism reveals whether a username exists or not by returning different error messages ("Unknown...

Published: Sep 29, 2025
Updated: Nov 11, 2025
Assigning CNA: mitre
Evidence observed: Aug 8, 2026

Primary CVSS

5.3/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS probability estimate

0.3%

Low · next 30 days

Percentile: 18.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Trivision NC-227WF firmware 5.80 (build 20141010) login mechanism reveals whether a username exists or not by returning different error messages ("Unknown user" vs. "Wrong password"), allowing an attacker to enumerate valid usernames.

Sources

CVE-2025-56764Informational
Username Enumeration in Trivision NC-227WF

Responsible use

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