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 information.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

No configuration.

History

25 Sep 2026, 21:17

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5

25 Sep 2026, 20:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-25 20:17

Updated : 2026-09-28 16:31

NVD link : CVE-2026-5267

Mitre link : CVE-2026-5267

CVE.ORG link : CVE-2026-5267

JSON object : View

Products Affected

No product.

CWE

CWE-306

Missing Authentication for Critical Function

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