CVE-2026-5269

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 could combine an attack using one of these accounts with other potential weaknesses to launch a more significant attack, possibly leading to escalation of privilege on the system.

CVSS v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

No configuration.

History

15 Jul 2026, 15:16

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 9.8

14 Jul 2026, 23:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-14 23:17

Updated : 2026-07-15 20:08

NVD link : CVE-2026-5269

Mitre link : CVE-2026-5269

CVE.ORG link : CVE-2026-5269

JSON object : View

Products Affected

No product.

CWE

CWE-1393

Use of Default Password

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