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    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.

    Published:Jul 14, 2026
    Last Modified:Aug 2, 2026
    EPS:Jul 14, 2026
    EPSS Score:0.00452
    CVSS Score:9.8

    Affected Products

    Vendor
    Blue Planet
    Product
    Inventory
    Vendor
    Blue Planet
    Product
    Orchestration
    Vendor
    Blue Planet
    Product
    Route Optimization & Analysis
    Vendor
    Blue Planet
    Product
    Unified Assurance & Analytics
    Vendor
    Ciena
    Product
    Mcp
    Vendor
    Ciena
    Product
    Navigator Ncs
    Vendor
    Ciena
    Product
    Planner Plus Onprem

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-287 Improper Authentication

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High