Denial of Service Vulnerability in F5 BIG-IP Products
CVE-2025-55670

7.1HIGH

Key Information:

Vendor

F5
Status
Big-ip Next Spk
Big-ip Next Cnf
Big-ip Next For Kubernetes
Vendor
CVE Published:
15 October 2025

What is CVE-2025-55670?

A vulnerability exists in F5 BIG-IP Next CNF, Next SPK, and Next for Kubernetes systems, where repeated undisclosed API calls may lead to a termination of the Traffic Management Microkernel (TMM). This can result in service interruptions and degraded system performance. It is important to note that affected software versions which have reached End of Technical Support (EoTS) are excluded from evaluations.

Affected Version(s)

BIG-IP Next CNF 1.1.0

BIG-IP Next for Kubernetes 2.0.0 < 2.1.0

BIG-IP Next SPK 1.7.0

References

https://my.f5.com/manage/s/article/K000154614
vendor-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

F5
JSON
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CVE-2025-55670 : Denial of Service Vulnerability in F5 BIG-IP Products