CVE-2025-55670

BIG-IP Next (CNF, SPK, and Kubernetes) vulnerability

State: Published
Severity: 7.1 High
Published: Oct 15, 2025
Updated: Feb 26, 2026
Reserved: Oct 3, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	f5
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	f5

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
BIG-IP Next SPKF5	2.0.0 and laterNot affected 1.7.0 and laterAffected
BIG-IP Next CNFF5	2.0.0 and laterNot affected 1.1.0 and laterAffected
BIG-IP Next for KubernetesF5	2.0.0 to before 2.1.0Affected

References

https://my.f5.com/manage/s/article/K000154614vendor-advisory

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