Critical 9.8Published Jul 14, 2026

CVE-2026-5270Authentication Bypass in Navigator and Blue Planet Products

Updated under an hour ago (Oct 27, 2026, 4:00 AM ET)

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It affects CIENA Navigator NCS and 6 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for CIENA Navigator NCS

Exploited in the last 30 days

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: 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-287
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Ciena
NVD analysis: Awaiting Analysis
Record last updated: Jul 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

CIENA Navigator NCS ciena:navigator_ncs (from the name)	8.1	CNA record
CIENA MCP ciena:mcp (from the name)	through 8.0	CNA record
CIENA Planner Plus OnPrem ciena:planner_plus_onprem (from the name)	through 4.1	CNA record
Blue Planet Inventory blue_planet:inventory (from the name)	through 24.04.001; through 23.12.401; through 23.08.302; through 23.04.701	CNA record
Blue Planet Orchestration blue_planet:orchestration (from the name)	through 24.04.2; through 23.12.3; through 23.08.4; through 23.04.2	CNA record
Blue Planet Route Optimization & Analysis blue_planet:route_optimization_and_analysis (from the name)	through 24.04.1.2-R; through 23.12.1.6-R; through 23.08.1.6-R; through 23.04.P01-9-R	CNA record
Blue Planet Unified Assurance & Analytics blue_planet:unified_assurance_and_analytics (from the name)	through 24.04 MR1; through 23.12 MR3; through 23.04. MR4	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.