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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (21.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
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
- my.f5.com/manage/s/article/K000154614 (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.