Description
Netcore NR256CN through 1.5.140116 contains an authentication bypass vulnerability that allows unauthenticated attackers to reach protected management CGI handlers by prefixing the URI with a public route. Attackers can request paths prefixed with l7_web_auth.cgi or an .ico route to invoke protected management handlers without credentials.
Published: 2026-10-16
Score: 6.9 Medium
EPSS: n/a
KEV: No
Impact: Authentication Bypass
Action: Apply Update
AI Analysis

Impact

Netcore NR256CN routers up to version 1.5.140116 have a flaw that allows an attacker to bypass authentication by prefixing a management CGI URI with specific public routes such as l7_web_auth.cgi or an .ico path. This flaw lets anyone, without credentials, invoke protected management handlers and potentially alter router configuration or access sensitive information. The weakness is an improper authentication issue as identified by CWE-288.

Affected Systems

The vulnerability affects Netcore NR256CN devices running firmware versions up to 1.5.140116. No other product versions were mentioned as affected, and detailed version ranges are not provided in the advisory.

Risk and Exploitability

The CVSS score of 6.9 indicates moderate severity. EPSS is not available, but the vulnerability is listed as not in the CISA KEV catalog. Path prefixes are sent over the device's HTTP interface, so remote exploitation is likely possible from any host that can reach the router's management port. Attackers can discover the vulnerability by probing known public routes and then execute arbitrary CGI handlers without authentication.

Generated by OpenCVE AI on October 16, 2026 at 18:57 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest firmware or patch that fixes the CGI authentication bypass.
  • Disable or remove public routes that expose management CGI handlers, such as l7_web_auth.cgi and .ico paths.
  • Restrict access to the router’s management interface to trusted IP addresses or enforce VPN access.
  • Configure the router to require authentication for all CGI endpoints, ensuring that unauthorized requests are denied.

Generated by OpenCVE AI on October 16, 2026 at 18:57 UTC.

Tracking

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Advisories

No advisories yet.

History

Fri, 16 Oct 2026 17:45:00 +0000

Type Values Removed Values Added
Description Netcore NR256CN through 1.5.140116 contains an authentication bypass vulnerability that allows unauthenticated attackers to reach protected management CGI handlers by prefixing the URI with a public route. Attackers can request paths prefixed with l7_web_auth.cgi or an .ico route to invoke protected management handlers without credentials.
Title Netcore NR256CN through 1.5.140116 Authentication Bypass via CGI Path Prefix
Weaknesses CWE-288
References
Metrics cvssV3_1

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

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}

Subscriptions

No data.

cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-16T18:19:03.901Z

Reserved: 2026-10-16T14:31:23.358Z

Link: CVE-2026-111712

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-16T18:17:55.453

Modified: 2026-10-16T19:17:05.347

Link: CVE-2026-111712

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-16T19:00:11Z

Weaknesses
  • CWE-288

    Authentication Bypass Using an Alternate Path or Channel