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CIENA Navigator NCS

CVE-2026-5267 High 7.5 Unauthenticated Event Stream Exposure of Session Tokens in Navigator NCS 0.4%
CVE-2026-5269 Critical 9.8 Navigator NCS and MCP System Accounts with Default Passwords 0.5%
CVE-2026-5270 Critical 9.8 Authentication Bypass in Navigator and Blue Planet Products 0.7%