CVE-2026-5270
Critical
Description
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductNavigator NCS
PublishedJul 14, 2026
First seenJul 14, 2026
Weakness typeCWE-287Improper authentication
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| CIENA Navigator NCS | 8.1 | — |
| CIENA MCP | <= 8.0 | — |
| CIENA Planner Plus OnPrem | <= 4.1 | — |
| Blue Planet Inventory | <=24.04.001, <=23.12.401, <=23.08.302, <=23.04.701 | — |
| Blue Planet Orchestration | <=24.04.2, <=23.12.3, <=23.08.4, <=23.04.2 | — |
| Blue Planet Route Optimization & Analysis | <=24.04.1.2-R, <=23.12.1.6-R, <=23.08.1.6-R, <=23.04.P01-9-R | — |
| Blue Planet Unified Assurance & Analytics | <=24.04 MR1, <=23.12 MR3, <=23.04. MR4 | — |
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