CVE-2026-5269CWE-1393

Navigator NCS and MCP System Accounts with Default Passwords

Critical · published July 14, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
40.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00483 · 40.7th percentile
Weakness
CWE-1393 · Use of Default Password
Published
2026-07-14T22:25Z
EPSS history
Timeline
  • 14 JUL 22:25Z
    Navigator NCS and MCP System Accounts with Default Passwords
    cvelistv5