CVE-2026-5270

An authentication bypass vulnerability exists in certain releases of Ciena Navigator Network Control Suite (NCS), Manage Control Plan (MCP), and Blue Planet products. The issue is caused by improper handling of HTTP request paths and headers, which allows an unauthenticated attacker to manipulate requests in a manner that bypasses authentication and associated audit logging controls.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.ciena.com/product-security

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-14 23:17

Updated : 2026-07-15 20:08

NVD link : CVE-2026-5270

Mitre link : CVE-2026-5270

CVE.ORG link : CVE-2026-5270

JSON object : View

Products Affected

No product.

CWE

CWE-287

Improper Authentication

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