CVE-2025-55670: big-ip next for DoS — Fix

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.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-770 CWE-770

Affected Products

Vendor	Product	Versions
f5	big-ip_next_cloud-native_network_functions	1.1.0 — 1.4.1
f5	big-ip_next_for_kubernetes	All
f5	big-ip_next_service_proxy_for_kubernetes	1.7.0 — 1.9.2

References

Advisories & Patches

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

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. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-55670? +

CVE-2025-55670 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-55670? +

CVE-2025-55670 affects products from f5, specifically: big-ip_next_cloud-native_network_functions, big-ip_next_for_kubernetes, big-ip_next_service_proxy_for_kubernetes. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-55670? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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