Traffic Management Microkernel Vulnerability in F5 Products
CVE-2025-53474

8.7HIGH

Key Information:

Vendor

F5
Status
Big-ip
Vendor
CVE Published:
15 October 2025

What is CVE-2025-53474?

This vulnerability allows the Traffic Management Microkernel (TMM) within F5's product suite to terminate unexpectedly when specific iRules employing the ILX::call command are configured on a virtual server. The issue arises from the handling of undisclosed traffic patterns, which could lead to potential unavailability and disruption of services. It is important to note that software versions that have reached End of Technical Support (EoTS) are not reviewed for this vulnerability.

Affected Version(s)

BIG-IP 17.5.0 < 17.5.1.3

BIG-IP 17.1.0 < 17.1.3

BIG-IP 16.1.0 < 16.1.6.1

References

https://my.f5.com/manage/s/article/K44517780
vendor-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

F5
JSON
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