Description
Netcore NR255-V version 1.5.130703 contains a sensitive information disclosure vulnerability in l7_web_auth_user_show.cgi related to captive-portal credential handling. Attackers can query this component to obtain captive-portal user credentials, compromising confidentiality of authenticated network access.
Published: 2026-09-15
Score: 7.1 High
EPSS: < 1% Very Low
KEV: No
Impact: Sensitive Information Disclosure
Action: Apply Patch
AI Analysis

Impact

The Netcore NR255-V router firmware version 1.5.130703 has a vulnerability in the l7_web_auth_user_show.cgi CGI script that allows an attacker to query the endpoint and retrieve captive-portal user credentials. The flaw is a missing access control that leads to an exposure of sensitive authentication data, thereby compromising the confidentiality of network access for users that connect through the captive portal. This flaw is classified as CWE-522, Data Exposure.

Affected Systems

Netcore NR255-V router firmware version 1.5.130703 is affected. No other versions or products are listed as impacted in the advisory.

Risk and Exploitability

The CVSS score of 7.1 indicates a medium‑to‑high severity for an information‑disclosure flaw. The EPSS score of less than 1 % suggests the probability of exploitation is currently very low, and the vulnerability is not listed in CISA’s KEV catalog. The likely attack vector is a remote HTTP request to the l7_web_auth_user_show.cgi endpoint, which, if publicly accessible, could allow an adversary to harvest captive‑portal credentials.

Generated by OpenCVE AI on September 18, 2026 at 13:33 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest Netcore NR255-V firmware update that addresses the credential disclosure vulnerability.
  • Restrict access to the l7_web_auth_user_show.cgi endpoint behind a firewall or internal network so it is no longer publicly reachable.
  • Configure captive‑portal login to use strong, non‑default passwords and consider disabling or blocking the exposed CGI script until a patch is applied.

Generated by OpenCVE AI on September 18, 2026 at 13:33 UTC.

Tracking

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Advisories

No advisories yet.

History

Thu, 17 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
First Time appeared Netcore
Netcore nr255-v
Vendors & Products Netcore
Netcore nr255-v
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Tue, 15 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
Description Netcore NR255-V version 1.5.130703 contains a sensitive information disclosure vulnerability in l7_web_auth_user_show.cgi related to captive-portal credential handling. Attackers can query this component to obtain captive-portal user credentials, compromising confidentiality of authenticated network access.
Title Netcore NR255-V 1.5.130703 Sensitive Information Disclosure via l7_web_auth_user_show.cgi
Weaknesses CWE-522
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

Netcore Nr255-v
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-17T19:27:27.252Z

Reserved: 2026-08-19T21:47:08.935Z

Link: CVE-2026-76854

cve-icon Vulnrichment

Updated: 2026-09-17T19:16:29.848Z

cve-icon NVD

Status : Deferred

Published: 2026-09-15T22:16:59.250

Modified: 2026-09-17T20:18:15.620

Link: CVE-2026-76854

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-18T13:45:08Z

Weaknesses
  • CWE-522

    Insufficiently Protected Credentials