CVE-2026-5267

HIGHCVSS 7.5/10

Last modified

CVE-2026-5267 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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..

Description

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.

Metrics

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
CienaNavigator NCS7.2 and any older release; 7.2-P01 through 7.2-P07; 8.0; 8.0-P01 through 8.0-P06A; 8.1; 8.1-P01 through 8.1-P06; 8.2; 8.2-P01 through 8.2-P06; 9.0; 9.0-P01 through 9.0-P05A; 9.1; 9.1-P01 through 9.1-P05; 9.2; 9.2-P01 through 9.2-P02; 10.0; 10.0-P01 through 10.0-P01B

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-5267?
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.
How severe is CVE-2026-5267?
CVE-2026-5267 has a CVSS score of 7.5/10 (HIGH severity).
How do I fix CVE-2026-5267?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST