CVE-2025-53474

BIG-IP iRules vulnerability

State: Published
Severity: 8.7 High
Published: Oct 15, 2025
Updated: Feb 26, 2026
Reserved: Oct 3, 2025

Description

When an iRule using an ILX::call command is 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.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N	f5
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	f5

Weaknesses

CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Affected Products

Product	Versions
BIG-IPF5	17.5.0 to before 17.5.1.3Affected 17.1.0 to before 17.1.3Affected 16.1.0 to before 16.1.6.1Affected 15.1.0 to before 15.1.10.8Affected

References

https://my.f5.com/manage/s/article/K44517780vendor-advisory

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