What’s Vulnerable › Vulnerabilities
CVE-2026-5269: Navigator NCS and MCP System Accounts with Default Passwords
- Severity: critical (CVSS 9.8 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-07-14 · updated 2026-07-15
- Weakness: CWE-1393
Description
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.
Affected products
- CIENA MCP: through 8.0
- CIENA Navigator NCS: 8.1
- CIENA Planner Plus OnPrem: through 4.1
References
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