CVE-2026-5267

Ciena Navigator Network Control Suite NCS contains an information exposure vulnerability in an event-streaming API that does not properly enforce authentication. An unauthenticated attacker with network access to the affected service could access the event stream and potentially obtain sensitive...

EUVD-2026-87295

Ciena Navigator Network Control Suite NCS contains an information exposure vulnerability in an event-streaming API that does not properly enforce authentication. An unauthenticated attacker with network access to the affected service could access the event stream and potentially obtain sensitive...

CVE-2026-5270: Improper Authentication

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...

CVE-2026-5269: Use of Default Password

In Ciena's Navigator Network Control Suite NCS and Manage Control Plan MCP, there are hidden system accounts used for internal software operations. Some of these accounts have default passwords that may be predictable. While these accounts have very limited permissions on their own, an attacker...