BaseFortify

Publication date: 2025-10-15

Last updated on: 2025-10-22

Assigner: F5 Networks

Description

When the BIG-IP Advanced WAF and ASM security policy and a server-side HTTP/2 profile are configured on a virtual server, undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2025-10-15

Last Modified

2025-10-22

Generated

2026-07-07

AI Q&A

2025-10-15

EPSS Evaluated

2026-07-05

NVD

CVE-2025-55669

Affected Vendors & Products

Vendor	Product	Version / Range
f5	big-ip_application_security_manager	From 16.1.0 (inc) to 16.1.6 (exc)
f5	big-ip_application_security_manager	From 17.1.0 (inc) to 17.1.2 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-672	The product uses, accesses, or otherwise operates on a resource after that resource has been expired, released, or revoked.

Attack-Flow Graph

Executive Summary

This vulnerability occurs when the BIG-IP Advanced WAF and ASM security policy are used together with a server-side HTTP/2 profile on a virtual server. Under these conditions, certain undisclosed traffic can cause the Traffic Management Microkernel (TMM) to terminate unexpectedly.

Impact Analysis

The impact of this vulnerability is that the Traffic Management Microkernel (TMM) can terminate unexpectedly, which may lead to denial of service or disruption of traffic management on the affected virtual server.

Hi! I’m here to help you understand CVE-2025-55669. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70