Unauthenticated Event Stream Exposure of Session Tokens in Navigator NCS

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

Ciena Navigator Network Control Suite (NCS) contains an information exposure vulnerability in an event-streaming API that does not properly enforce authentication. An unauthenticated attacker with network access to the affected service could access the event stream and potentially obtain sensitive information.

Source published

25 Sep 2026 19:10:46 UTC

Source modified

25 Sep 2026 20:40:31 UTC

Observed here

23 Oct 2026 15:48:27 UTC

Source terms

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