Resource exhaustion in F5 Big-Ip Next Cloud-Native Network Functions
CVE-2025-55670
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.
EPSS: 0.003 (20.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- F5 Big-ip_next_cloud-native_network_functions
- F5 Big-ip Next Cnf — versions 2.0.0, 1.1.0
- F5 Big-ip Next For Kubernetes — versions 2.0.0
- F5 Big-ip_next_for_kubernetes — versions 2.0.0
- F5 Big-ip_next_service_proxy_for_kubernetes
- F5 Big-ip Next Spk — versions 2.0.0, 1.7.0
Weakness classification (CWE)
References
- f5sirt@f5.com (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-55670?
- CVE-2025-55670 is a medium-severity vulnerability in F5 Big-Ip Next Cloud-Native Network Functions, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2025-10-15.
- How severe is CVE-2025-55670?
- Medium severity. CVSS v3 base score is 6.5 out of 10.