CVE-2025-55670Network attack vector

Authenticated TMM termination via repeated API calls

Published Oct 15, 2025 · Updated Oct 15, 2025

Denial of service in F5 BIG-IP Next CNF, SPK, and for Kubernetes allows remote authenticated users to terminate TMM via API calls. F5 identifies missing resource limits but has not disclosed the API endpoints, request-processing path, or exhausted resource. Low-privileged API access and repeated requests are required; termination interrupts data-plane traffic handled by the affected TMM instance.

CVSS severity7.1
High
EPSS probability0.31%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in F5 BIG-IP Next CNF, SPK, and for Kubernetes allows remote authenticated users to terminate TMM via API calls. F5 identifies missing resource limits but has not disclosed the API endpoints, request-processing path, or exhausted resource. Low-privileged API access and repeated requests are required; termination interrupts data-plane traffic handled by the affected TMM instance.

The record

CVE
CVE-2025-55670
Published
Oct 15, 2025
Updated
Oct 15, 2025
Vendor
F5 Networks
Product
BIG-IP Next for Kubernetes
Classifications
CWE-770, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0.0 <2.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

F5 Networks · BIG-IP Next for Kubernetesversion=2.0.0 <2.1.0
F5 Networks · BIG-IP Next CNFversion=1.1.0 <*
F5 Networks · BIG-IP Next SPKversion=1.7.0 <*

Published CVSS scores

7.1F5 NetworksCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
6.5F5 NetworksCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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