How severe is CVE-2025-55670?

CVE-2025-55670 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-55670 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-55670?

CVE-2025-55670 primarily affects F5 Big-ip Next Cloud-native Network Functions. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-55670?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-55670 have an EU (EUVD) identifier?

Yes. CVE-2025-55670 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34641.

When was CVE-2025-55670 published?

CVE-2025-55670 was published on 2025-10-15 and last updated on 2026-06-17.

CVE-2025-55670

CVE-2025-55670 is a medium-severity vulnerability in F5 Big-ip Next Cloud-native Network Functions with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-34641
Weakness: CWE-770
Affected product: F5 Big-ip Next Cloud-native Network Functions
Published: 2025-10-15
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2025-55670?: CVE-2025-55670 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-55670 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-55670?: CVE-2025-55670 primarily affects F5 Big-ip Next Cloud-native Network Functions. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-55670?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-55670 have an EU (EUVD) identifier?: Yes. CVE-2025-55670 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34641.
When was CVE-2025-55670 published?: CVE-2025-55670 was published on 2025-10-15 and last updated on 2026-06-17.

References

https://my.f5.com/manage/s/article/K000154614

Affected products (3)

cpe:2.3:a:f5:big-ip_next_cloud-native_network_functions:*:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_next_for_kubernetes:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:f5:big-ip_next_service_proxy_for_kubernetes:*:*:*:*:*:*:*:*

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