Vulnerability

CVE-2026-5267

Descriptive record received from OpenCTI and minimised for consultation in the Intel portal.

Sharing: PUBLIC-OSINT
Confidence: 100
Source: The CVE Program
Updated: 26/09/2026 04:39

Description

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 information.

STIX identifiervulnerability--a40d6189-5508-5692-8f99-b4a4259f4c93

First observation-

Last observation-

Known relationships21

Aliases and classifications

CWE-306Missing Authentication for Critical Function

Minimised technical details

No raw data

cisa kev: False
cvss score: 7.5
cvss vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
cvss severity: HIGH

Provenance

Public references

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

EudorIA correlation

Intel catalogue

The vulnerability is also available in the EudorIA editorial catalogue.

Open EudorIA analysis

Presence in OpenCTI describes an intelligence correlation and does not, by itself, constitute evidence of compromise, legal attribution or operational guidance applicable without context verification.