CVE-2026-5270

critical · 9.8

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.

9.8

CVSS

0.7%

EPSS (exploit prob.)

50th

EPSS percentile

2026-07-14

Published

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-287

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-5270