CVE-2025-55670: F5 BIG-IP Next Cloud-Native Network Functions

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

On BIG-IP Next CNF, BIG-IP Next SPK, and BIG-IP Next for Kubernetes systems, repeated undisclosed API calls can cause the Traffic Management Microkernel (TMM) to terminate.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Affected products

• F5 BIG-IP Next Cloud-Native Network Functions: from 1.1.0, up to and including 1.4.1
• F5 BIG-IP Next For Kubernetes: version 2.0.0 only
• F5 BIG-IP Next Service Proxy For Kubernetes: from 1.7.0, up to and including 1.9.2

Published 2025-10-15. Last modified 2026-06-17.