CVE-2026-5270CWE-287

Authentication Bypass in Navigator and Blue Planet Products

Critical · published July 14, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
51.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00664 · 51.1th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-07-14T22:24Z
EPSS history
Timeline
  • 14 JUL 22:24Z
    Authentication Bypass in Navigator and Blue Planet Products
    cvelistv5