CVE-2026-41039
Information disclosure vulnerability in Quantum Networks Router due to missing authentication on sensitive internal endpoints, allowing unauthenticated access to internal API paths, scripts, and configuration resources.
Overview
| Field | Value |
|---|---|
| CVE ID | CVE-2026-41039 |
| Vendor | Quantum Networks |
| Product | Quantum Networks Router |
| Severity | High (CVSS 8.7) |
| CWE | CWE-306 — Missing Authentication for Critical Function |
CVE-2026-41039 is an information disclosure vulnerability affecting Quantum Networks Router devices. The issue stems from insufficient authentication and improper access control enforcement on sensitive internal endpoints. Certain resources intended for authenticated administrative users can be accessed without proper authorization checks, allowing unauthenticated attackers to gather internal application information and enumerate sensitive resources.
Technical Details
The affected router exposes internal resources without consistently validating user authentication status. Requests directed toward administrative or diagnostic endpoints are processed even when no valid session exists.
An attacker can leverage this weakness to enumerate:
- Internal API endpoints
- Administrative scripts
- Hidden directories
- Diagnostic resources
- Configuration-related components
The disclosed information may provide valuable reconnaissance data that can be combined with additional vulnerabilities for more advanced attacks.
Impact
Successful exploitation may allow an attacker to:
- Access sensitive internal resources.
- Discover hidden application endpoints.
- Enumerate administrative functionality.
- Gather intelligence for chained attacks.
- Reduce the complexity of further exploitation attempts.
Attack Scenario
- The attacker identifies an exposed Quantum Networks Router management interface.
- The attacker sends crafted requests to internal administrative endpoints.
- Due to missing authentication checks, the server responds with sensitive information.
- Internal resources, scripts, or directories become visible.
- The attacker uses the disclosed information to facilitate subsequent attacks.
Root Cause Analysis
The vulnerability exists because authentication and authorization checks are not consistently enforced across sensitive application functionality. Critical internal resources should validate that the requesting user has successfully authenticated before returning any sensitive information.
Mitigation
Administrators are advised to:
- Upgrade to the latest firmware release provided by the vendor.
- Restrict management interface access to trusted internal networks.
- Disable unnecessary remote administration features.
- Implement network-level access controls.
- Continuously monitor logs for suspicious access attempts.
- Periodically audit exposed administrative endpoints.
References
- CVE Record: https://www.cve.org/CVERecord?id=CVE-2026-41039
- CERT-In Vulnerability Note: https://www.cert-in.org.in/s2cMainServlet?pageid=PUBVLNOTES01&VLCODE=CIVN-2026-0200
- CWE-306: https://cwe.mitre.org/data/definitions/306.html
- OWASP Top 10 2021 — Broken Access Control: https://owasp.org/Top10/A01_2021-Broken_Access_Control/
Discoverers: Rakesh Elamaran, Joel William A Bajino, Viju Stalin S (w4nn4d13), Janish Andrin J, Kalpana B N
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