Vulnerability · Published Jul 14, 2026 · Assigned by Ciena
CVE-2026-5270Authentication Bypass in Navigator and Blue Planet Products
Critical 9.8
In plain English
A critical-severity improper authentication in Inventory from Blue Planet. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 52% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| 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 |
Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H