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.
Scoring
- Severity
- CRITICAL
- CVSS base score
- 9.8
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS probability
- 0.48%
- CWE
- CWE-1393
- Published
- 2026-07-14
- Last modified
- 2026-07-15
Affected products
- CIENA Navigator NCS
- CIENA MCP
- CIENA Planner Plus OnPrem
Weakness type
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