CienaCVE-2026-5270
Ciena Inventory: authentication bypass
Critical9.8CVE-2026-5270 · Published Jul 14, 2026 · updated Jul 15, 2026
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 versions
| Package | Affected | Fixed in |
|---|---|---|
| Inventory Product | <= <=24.04.001 | No fix yet |
| <= <=23.12.401 | No fix yet | |
| <= <=23.08.302 | No fix yet | |
| <= <=23.04.701 | No fix yet | |
| MCP Product | <= <= 8.0 | No fix yet |
| Navigator NCS Product | <= 8.1 | No fix yet |
| Orchestration Product | <= <=24.04.2 | No fix yet |
| <= <=23.12.3 | No fix yet | |
| <= <=23.08.4 | No fix yet | |
| <= <=23.04.2 | No fix yet | |
| Planner Plus OnPrem Product | <= <= 4.1 | No fix yet |
| Route Optimization & Analysis Product | <= <=24.04.1.2-R | No fix yet |
| <= <=23.12.1.6-R | No fix yet | |
| <= <=23.08.1.6-R | No fix yet | |
| <= <=23.04.P01-9-R | No fix yet | |
| Unified Assurance & Analytics Product | <= <=24.04 MR1 | No fix yet |
| <= <=23.12 MR3 | No fix yet | |
| <= <=23.04. MR4 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity from
- CISA (its enrichment of the CVE record)
- Weakness
- CWE-287
More Ciena advisories
All Ciena| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 25 | Ciena Navigator NCS: information disclosure | High7.5 | No fix yet |
| Jul 14 | Ciena MCP: privilege escalation | Critical9.8 | No fix yet |
| Jul 6 | Ciena 6500 S-Series: authentication bypass | Critical9.1 | No fix yet |